Diary Of An ADI

A Driving Instructor's Blog

I had my first non-insectoid and non-arachnoid visitor to my birdbox today. What appears to have been a Great Tit popped in and cased the joint.

He (or she) inspected every corner, and even checked the walls for integrity.

Apparently, this time of year they’re looking for places to roost, so I hope he comes back and then sticks around with a mate next Spring.


We’re now officially into autumn, and I’m getting a lot of hits right now. If your Birch is just starting to show a few yellow leaves, it’s not unusual. The Elms are already turning, because it’s what they do around autumn. My Birch is still fully green, and the feeding and heavy watering has had a lot to do with that. If you haven’t been watering, remember that it’s been a dry summer, so yours may turn earlier. Just prepare for next year and start feeding and watering from March.

Our Silver Birch in June 2017Back in 2014, when I originally wrote this, our Birch tree suddenly began to produce a lot of yellow leaves in mid-June. After a lot of research I managed to figure out the possible causes and the remedies. That was the purpose of the original article.

However, 2018 threw up a new issue. It turned out to be the hottest year on record, but even before we found that out people will remember how hot it was, and for how long it stayed like that. My tree once again began to show a few sprays of yellow fairly early in the season.

The article becomes popular each year, firstly in late Spring and early Summer, then again later in the season closer to Autumn.

In 2014, I identified the following as likely causes of premature yellowing:

  • nutrient deficiency
  • iron deficiency
  • manganese deficiency

After the 2018 heatwave, I further identified lack of water as a major factor. With hindsight, it may have also been a factor in that 2014 season, but nothing compared with 2018 for prolonged heat and lack of rain.

When I first experienced yellowing back in 2014, I initially thought my tree was dying. Googling for an answer was pretty much useless, because most of the technical advice is American and focuses on the Bronze Birch Borer (a beetle that feeds on white birches), which isn’t known outside of  North America. But somewhere in among the advice, I came across a simple comment – and I don’t recall where I saw it now – that made a lot more sense.

In a nutshell, premature yellowing/leaf drop can be caused by nutrient and iron deficiencies in the soil. This comes about over a period of time as fallen leaves are swept up each year and sent to the tip, so none of the nutrients are returned to the soil. Consequently, the soil becomes depleted of them.

Birches are ericaceous – lime-hating – plants, and prefer a slightly acidic soil. As such, you need to feed them using ericaceous fertiliser. I first used Miracle-Gro solid fertiliser, intended for Azaleas and Rhododendrons (also lime-hating), but a couple of years later switched to Doff liquid feed so I could use it in my Access Irrigation Static Dilutor. I also got hold of some Maxicrop Seaweed Extract, which is also liquid, and watered that in at the same time.

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My original problem showed itself as canary-yellow leaves, either in sprays, or randomly dotted throughout the canopy. On closer inspection, some of the leaves looked like those in the photograph here.Leaves suffering from chlorosis

This is known as chlorosis. Leaves are usually green because they contain chlorophyll – and chlorophyll is green. Chlorophyll is what allows plants to convert light energy into sugars that they can use as food through the process called photosynthesis. Plants use iron to produce chlorophyll, so if there isn’t enough iron in the soil the tree can’t make enough chlorophyll, and you get yellowed leaves. The tree compensates for being hungry (if it hasn’t got chlorophyll it can’t make food for energy) by going into shutdown and shedding those leaves. And you may also find that new leaves are small and misshapen when chlorosis is the issue.

You can easily treat chlorosis using sequestered iron (or seaweed extract). Being ‘sequestered’, the tree can suck the iron up and use it right away. A longer term solution is to use iron sulphate lawn feed, which also slightly acidifies the soil over time.Close-up of leaves suffering from chlorosis

I also bought some manganese to water in the first time, but I am not sure how relevant that was. I used it for a couple of seasons, but stopped. Each year, I simply feed the tree once or twice a month between March and September using fertiliser and seaweed extract.

Note that none of these problems are confined to Silver Birches. All trees and plants can be affected by nutrient deficiencies, and you simply have to deal with the problem using the appropriate, easily purchased treatments.Close-up of our tree's leaves in June 2017

In that first season, a single application of fertiliser stopped the leaf drop almost immediately. Once the already-yellow leaves had fallen, the tree remained green until Autumn, and even threw out some large new leaves and fat catkins. It obviously liked what I had done to it, and I continued doing it from June until September every few weeks.

Everything was fine until the hot summer of 2018. You might recall that the prolonged heatwave began quite early, and by the end of June I was again noticing a few sprays of yellow. I wasn’t a nutrient issue this time – I was feeding the tree regularly – but I’d already guessed the hot weather might have something to do with it, and a bit more research showed that heat stress in trees is a real issue, and Birches are highly susceptible to it.

It turns out that lack of moisture in the ground combined with prolonged high air temperatures causes trees – and especially Birches – to become stressed, which again triggers them to go into emergency shutdown by shedding leaves.

My research provided two options for getting water down to the roots (which fortunately, in the case of Birches, is quite shallow). One involved hammering at least half a dozen hollow spikes into the ground around the tree and dripping water directly down to them. I decided against that on the basis that a) the ground was already as hard as iron plate, b) anything which sounds so simple (i.e. hammering a hollow plastic spike into the soil) was going to turn into a nightmare of split plastic, only being able to get part way down, and discovering chunks of bedrock I didn’t know were there, and c) having these things poking out of the lawn would look bloody awful even if I got them in (and even worse if they only went in part-way). The easier option was to commence heavy-watering immediately – basically, to run the sprinklers for hours at a time every  night.

That method fixed the problem in less than a week.

With hindsight, it is quite possible that lack of moisture was a contributing factor back in 2014, and my feeding routine would have dealt with that automatically (though I did have chlorosis). But in 2018, it was definitely just the result of too little moisture around the roots.

So, to summarise. If you experience premature leave-yellowing, the very first thing you should do is water like crazy. Don’t worry about over-watering too much – Birches like wet soil, which is why they grow near streams. Just don’t turn your garden into a swamp. While you’re doing that, buy some ericaceous feed and seaweed extract, and get that into your soil as soon as possible (how much depends on how big your tree is).

Can you rescue leaves which have turned yellow?

No, probably not. I suppose that chlorosis could be reversed if you caught it early enough, but if the leaf is dead and the tree has triggered its shedding mechanism, you’re going to lose them.

The important thing is that by feeding and watering the tree you can stop any further yellowing – and believe me, the first time you do it the effects will be quite noticeable within a short time.

Do you have to keep treating the trees?

Yes. If you don’t, the problem just comes back once the tree has used up what you’ve fed it, especially if you bin the leaves again the following autumn. Huge trees will suck up all the nutrients and water, and if you’re raking up and binning the leaves each year (or if the soil is dry and there are no prolonged periods of rain) nothing gets returned to the soil.

How often should you feed?

Treat them once or twice a month from March until September. And water regularly.

Can heat and drought cause them to lose leaves?

Yes. If they are stressed you may get them dropping leaves. In extreme cases the leaves can go brown and the tree can even die. It’s a good idea to water them deeply during hot, dry periods. Once or twice a week should be enough, though more frequently won’t hurt if the dry period is prolonged.

Remember that after a period of drought (or prolonged dry weather) it needs an extended period of rain to wet the soil again, especially deep down. A few heavy downpours won’t do it, and you will still need to help things along.

Will a Birch recover from drought?

It depends on whether the drought killed it or not. A reader wrote to me in 2018, mentioning that his tree had lost its leaves, and I advised that the only thing he could do right then was to feed and water – and hope for the best. He wrote to me in 2019 to tell me the tree had started to rock in the wind, and that a tree surgeon had subsequently declared it dead, and had had to remove it. Apparently, the roots were rotten.

There’s no way of knowing if it was just the drought that did the damage. The tree may have been weakened by not feeding and watering over previous years, and the drought was just the final nail in the coffin. But the 2018 heatwave certainly caused problems.

Is there any other way to deal with the problem?

You have to get nutrients and iron back into the soil. And you need water in order for the roots to be able to access those nutrients. Yes, you could use your own mulch or bought compost, but obviously this is not so attractive in a normal garden (removing it is what got you here in the first place). It would also take longer to have an effect. But it would still work, given time.

When do Birch trees normally start to shed their leaves?

In the Autumn! In the UK this is from around September-October, and the onset varies up and down the country. It often seems triggered by a noticeable drop in night time temperatures. The leaves will begin to fall from that point – very lightly at first, then increasing as the yellowing spreads.

Why do birch trees drop leaves so early?

They don’t. They drop them in Autumn, like all other trees which shed their leaves each year. If yours is turning early, you may have a problem.

How do you apply these treatments?

You make up the required solution as directed on the pack, then water it into the area specified. I use a combined watering/fertilising system, which I have written about separately. However, you can use a watering can and hosepipe/sprinkler as necessary. Note that if the ground is dry, a watering can won’t get the nutrients down to the roots, so a heavy watering is essential.

Why are fallen leaves sticky?

You’ve probably got greenfly! Specifically, the birch aphid, Euceraphis betulae. They feed on the European Birch, Betula pendula, and they increase in number during warm and dry weather. Aphids secrete honeydew as they feed, and that’s the sticky stuff you’re seeing. Apparently, you can get different species of greenfly that feed on specific trees.

You can kill them with a soap/water mixture, though no one has ever been able to tell me precisely how you apply that to a 20 metre high tree. And the same goes for any chemical method relying on direct contact. An alternative solution is to introduce predatory insects – something that eats aphids. The best one is the Ladybird larva, and you can buy them online. There are other predatory insects you can buy, too.

My tree is losing branches and twigs

If the tree is weak then it is understandable that twigs and small branches might fall off. Once they’re stronger this will stop. In any case, if it is windy, a few dead twigs are bound to fall off. It’s just nature – and birches also have a fungus which can cause small twigs to die and fall.

In the Spring, Crows can also be a problem if they’re nesting nearby. They are very, very selective in their choice of twigs for the purpose, and they will tear off dozens until they get the right one. It’s nature, so we don’t worry when they’re using ours for their twigs.

When do birches start to show leaves?

In Spring, obviously, but the precise date varies depending on both the tree and the weather. In 2019, they were about a month earlier than 2018 in the UK. Mine is usually showing leaves sometime during April each year.

I’ve got catkins but no leaves

Someone found the site in April 2018 with that query. You’ll probably find that in a couple of weeks you’ll have lots of leaves. As I have said in this article, I start feeding mine from March onwards. Leaves start sprouting a week or two earlier than my neighbours’ trees, and the foliage on mine is usually much denser. The catkins often come before the leaves.

Are the leaves changing early this year?

This was a generic search term used to find the blog in mid-July 2017. The short answer is no, they are not – not in July in the UK, anyway. They change towards the end of September in the UK.

Do Weeping Silver Birches lose their leaves in Autumn?


When do Silver Birch leaves go all brown?

They don’t. The leaves should go yellow and fall off in the autumn.

I had quite a few visitors from this search term in 2018, and when I looked it up it seems that extreme cases of chlorosis and heat stress can result in leaves turning brown (see this supplementary article). It could also be a disease or infestation which you could treat, but the tree itself might also be dead – especially if it has been having any of the problems I mentioned above over previous years. Best to call in the experts.

Does this advice only apply to Silver Birch trees?

No. Chlorosis can affect many plants, and lack of nutrients is a universal issue. You might need a different fertiliser to address any nutrient problem, but iron will likely fix chlorosis. Lack of water can kill virtually any plant.


This is the live feed from my first birdbox camera. Right now, it’s on the back of the shed facing east, and about 2m from the ground.

In the first week, I’ve had three visitors (that I’ve noticed). A grub of some sort, a Ladybird, and a spider (there are several spider webs already attached to it on the outside).

But the main thing is that I got the Wi-Fi sorted using a TP-Link EAP 225 outdoor wireless access point. No more farting about with domestic wireless ‘extenders’ – I can now get maximum wireless right to the end of our garden, which is about 50m long, and no stupid dropouts or needs to reboot (which is a problem with domestic extenders). It’s just a constant strong signal.

The page is likely to be up and down over the next few weeks. Right now, the access point is propped up at the window of a bedroom, but it needs mounting outside, and that means drilling a 16mm hole in the wall so I can get an ethernet cable though. And I should point out that the feed will be incredibly boring unless something decides to reside in the box (apart from bugs).

Incidentally, during the day it is in full colour. At night, when the sensor detects low light, it turns off the internal LED lamp and switches to infrared, which renders in black and white. Around the time when that switch is made, the feed becomes jittery while the software makes up its mind.


The Chillmax AirAlso applies to InstaChill, Chill Tower, etc. I wrote this in the very hot summer of 2019. I get a huge spike in traffic several times each year whenever it gets hot.

Note that tonight I saw a new JML advert for the InstaChill. It is a larger version of the ChillMax, and it costs a lot more, too. But it works in exactly the same way. However, there is no way I am going to test one of those.

Be aware that these devices do not work to anything like the levels claimed. The original article follows.

Early in July 2019, I saw the Chillmax Air advertised on TV in one of those shouty ads. Then, the same evening, I was shopping in Asda and saw it on display. I am an idiot for things like this, and bought it on impulse so I could test whether it worked or not.

As a chemist, I know that in order to cool a large space effectively you’re going to need something with a big fan and a special refrigerant. In practical terms, that means a fairly bulky device with a motor-driven compressor, a closed radiator for the refrigerant to pass through, a fan to suck air in and blow it across the radiator, and a wide exhaust pipe through the wall or window to get rid of the ‘removed heat’. In some cases, you also need to collect or drain the condensed water that comes out of the air as it cools. A typical proper air conditioner for a small or medium-sized room will be about the size of bedside cabinet. The Chillmax Air is not much bigger than six CD cases glued into a cube.

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If you’ve used a normal desk fan you will know that you only feel cooler if you’re sweating a bit. That’s because the fan evaporates your sweat as it pushes air over it, and that evaporation is accompanied by a small cooling effect – it’s called ‘evaporative cooling’. If you’re not sweating, you don’t feel the effect. Conversely, if the surrounding air is very humid, then no matter how powerful your fan is, you will feel little or no cooling because sweat can only evaporate if the air has capacity to hold additional moisture (I’ll explain that a bit more later, because it’s what determines whether the Chillmax is any good).

As an aside, many liquids exhibit the evaporative cooling effect. In the case of diethyl ether (the stuff they used to use as an anaesthetic), if you force it to evaporate very quickly you can even freeze water (if you do it properly). However, ether is both highly flammable and toxic, so apart from demonstrating it in the school lab (where I remember it from, partly due to the massive headache the fumes gave me), it doesn’t have much practical application these days. Early refrigerators used it, which was spectacularly dangerous.

The Chillmax Air uses the evaporative cooling effect of water, and this is much less than with ether – similar to sweat, in fact. The unit consists of a reservoir at the top, which you fill with normal tap water, and this drips down on to a radiator unit which has ten sideways-stacked fibre panels in it through which a fan blows air. The water evaporates from the fibre panels, and the evaporatively cooled air comes out through the front grille. According to the marketing spiel on the TV ads, you’d be forgiven for thinking you’re going to get frostbite if you sit too close. I knew this wasn’t going to happen, but I wanted to know just how effective the Chillmax was.

When I first set it up and turned it on, the first thing I noticed was that the fan is quite powerful, so you get a good flow of air directed at you – but note that that it’s only a 5″ computer fan, so it can’t beat a proper desk fan for air flow. The air did seem a little cooler compared with what my desk fan was blowing at me, but it also felt ‘softer’ – that’s very important, and I’ll explain later. But the big question was how much cooler was the exhaust air?

I fired up my trusty data logger and left it in front of my desk fan for 30 minutes for the control data. Then I moved it and suspended it in front of the Chillmax for the same period of time. This is what it recorded (the red line is where I moved it).

Chillmax - temperature log in hot and sticky conditionsThe ambient temperature where I ran the test was about 29ºC. The Chillmax brought this down by about 4ºC.

So, the Chillmax definitely cools the air that passes through it. Let’s work on the assumption that it would be able to get the same 4ºC drop no matter what the ambient temperature was. If your room is 38ºC, pulling it down to 34ºC still means it’s bloody hot. And also note that since the Chillmax is physically so small, the cooling is very localised – it won’t cool a room down, and you have to have it less than a metre from your face to feel anything.

Now, some people might be thinking that a 4ºC is better than nothing at all. And they’d be right if it was just a matter of temperature. But there’s more to it than that. I mentioned that the exhaust from the Chillmax felt ‘softer’. I knew what it was, but my data logger shows it in numbers.

These are is the data for relative humidity recorded at the same time as the temperature measurement, above (the red line is where I moved the logger). The humidity went up dramatically – a jump of about 30%RH.

Chillmax - RH log in hot and sticky conditionsAs I’ve already explained, the Chillmax works by evaporating water on fibrous panels by forcing air across them. That water has got to go somewhere, and in this case it comes out as vapour in the cooled air. In the right light, you can actually see it – it’s essentially fog. And just like when it’s foggy outside, and everywhere gets damp, this vapour can condense on surfaces. My data logger collected some and began to drip during the test, and I have since discovered that it also condenses on the front grille and can drip periodically, so you’d need to be careful what you had underneath it if you placed it on a shelf. The fan is quite powerful enough to project the drips forward slightly when they drop.

The ambient humidity in the room where I did the test was about 44%RH. The Chillmax sent that up to over 70%RH.

It’s this elevation of the humidity of the cooled air which really brings into question whether the Chillmax is worth the investment. You’re probably aware that you can have a hot summer day in the high 20s where it is pleasant and comfortable, but a cooler and overcast day might be horribly sticky – or muggy. That’s because of the humidity, or water vapour in the air.

The amount of water vapour that air can hold varies with the temperature. Once you reach the maximum, any extra vapour condenses out as a liquid – misted up windows, dampness, even drips and pools of moisture on window sills or under lamp posts. Cold air can only hold a small amount of moisture before condensation occurs, but hot air can carry much more (think ‘sauna’). Although ‘humidity’ technically refers to the amount of water in the air, the figure most people are referring to when they say it is relative humidity. This is the amount of moisture in the air expressed as a percentage of the maximum amount it could hold at that temperature, hence the units %RH. It’s a very complicated subject, but the important factor for us here is that when it is warm or hot, higher relative humidity is uncomfortable. Indeed, you may have seen weather forecasts where they give the actual temperature and the ‘feels like’ equivalent – that’s a reference to the ‘Heat Index’, which takes into account the effect of the %RH. Here’s a graphical chart for that.

Heat Index - graphical representationAs an example, if the air temperature is 30ºC and 50%RH, it will feel like 31ºC, but if the humidity goes up to 80%RH, then it will feel like 38ºC – even though the thermometer still tells you it’s 30ºC.

Another example. If the air temperature is 35ºC, at 50%RH it will feel like 41ºC, but send the humidity up to 80%RH and it’ll feel like 57ºC – even though the thermometer still reads 35ºC.

The calculation for this is complex (you should see how long my Excel formula for it is). It is non-linear, and the increase in ‘feels like’ is greater at higher temperatures. It also contains an element of opinion/perception, which is why there’s no point using numbers above about 60ºC. But the ‘Heat Index’ is what forecasters use. Incidentally, the official health designations for the colours are: yellow – caution; amber – extreme caution; orange – danger; and red – extreme danger. Vulnerable people need to take these into consideration before going out in hot weather.

However, this is where the problems come in for the Chillmax and similar devices. If it’s 35ºC and 40%RH, it’ll feel like 37ºC. Cool the air to 31ºC but send the humidity up to 80%RH, and it’ll feel like 41ºC. So it’s actually hotter in terms of comfort. Do the same comparison when the surrounding temperature is 38ºC, and the ‘feels like’ goes from 43ºC to over 50ºC!

At lower temperatures the Chillmax will produce a slight net cooling effect. But if the air temperature is above about 30ºC (and 50%RH) – which isn’t excessively hot or humid to start with – it’ll actually make you feel warmer. And if it is already humid outside, you’ll feel hotter still.

Proper air conditioners remove water from the air they cool. This removal of moisture is why the air from proper air conditioners feels crisp, as opposed to the ‘softness’ of moist air. The Chillmax does the opposite of normal A/Cs, and adds moisture.

Aesthetically speaking, the Chillmax is a cube – more or less – about 15cm along each side. There are two buttons on the top rear, one which changes the fan speed to one of three settings (or off), with a blue LED for each, and another button that turns the night light on or off. There’s a flap on the top front through which you add the water. The radiator system is a plastic-framed insert which you access by pulling the front grille out. It slots in and out easily. You can’t officially replace the fibre inserts in the radiator, but you can buy the whole radiator assembly from JML for £15. My only major gripe is the power cable. The jack plug that goes into the Chillmax is quite stubby and doesn’t go into the socket very far, so it is easy to dislodge it. However, the cable itself is quite long, and the  mains plug is a moulded UK type.

JML claims the Chillmax can run for up to 10 hours per fill, but this is likely on the lowest of the three fan speeds, since on top speed it runs out in less than three hours.  JML sells the humidification as a positive without relating it to the comfort relationship between temperature and %RH, but note what I said above. If you want to cool down in humid weather, it isn’t just the temperature that needs to come down.

Does it really work?

It does cool the air by a few degrees, so in that sense it works. However, it also sends the humidity up, and in most cases that actually makes you feel hotter and more uncomfortable. In that sense, it doesn’t work.

Will it cool more if I use ice water?

No. Evaporative coolers are not influenced significantly by the temperature of the water used in them. The temperature of the air that comes out depends on the temperature (and humidity) of the air going in, and the science of evaporation. Only this evaporation results in the cooling effect observed.

Will it cool more if I put the filter in the freezer?

It might – while you’re blowing air over ice. But once they defrost, which will happen in a few minutes in the temperatures you’ll likely be experiencing, then no. You’ll also have more condensate to deal with from the melted ice pouring out of the front grille.

You may see reviews on Amazon claiming that freezing the filters (or using ice cubes in the water tank) does give cooler air. Trust me – apart from what I just said about blowing air over ice, it doesn’t. Science is involved, and evaporative cooling doesn’t work like that.

Can I use it to cool my PC?

Someone found this article on the search term “jml chillmax air for pc cooling”. No. Blowing damp air into your PC would be dangerous, potentially expensive, and would only gain you 4ºC at best.

Can you get larger versions?

Until August 2021, the answer in relation to the ChillMax was no. However, I saw an advert (as shouty as usual) for the InstaChill tonight. Unlike the ChillMax, which is the size of a small table top radio, the InstaChill is the size of a bedside cabinet. And you can certainly get larger evaporative coolers from other manufacturers. The working principle is identical, except that the larger the surface area of water, and the greater the airflow over that water, then the greater will be the possible drop in temperature at the front end (and the more moisture being pumped out to increase the humidity). However, cooling effectiveness is influenced greatly by the RH of the air going in.

If the air is very dry, then a large evaporative cooler might be able to drop inlet air at 30ºC down by as much as 10ºC. However, if the inlet air is very humid, the temperature drop could be as little as 1ºC. In the UK, the realistic temperature drop you could expect on a non-humid day for a large cooler would be around 5-6ºC, but on a sticky day you’d only get about a 3ºC drop.

Suppliers of these devices say that they need good ventilation or extraction, and I would imagine that’s so the humid air can escape. If you’re evaporating more water to get better cooling on larger devices, you’re also producing a lot more water vapour, so the cooling effectiveness will decrease as the humidity rises unless you vent it somehow. Be careful if you read any of the reviews on these things – people may have noticed cooling in already cooler conditions, but trust me – if it’s very warm and humid, you will not notice any effect.

People say it works

Be careful when you read those one-line reviews. If you test it when it’s only 20ºC outside – as many of these people have – then yes, it blows noticeably cooler air at you. But science is involved, and at temperatures above about 28-30ºC you’ll actually feel hotter. The fact that it increases humidity is the key factor. Remember that the reason you even found this article was probably because it’s over 30ºC outside – the more above that it is, then the more hits I get.

So, does the Chillmax/InstaChill work?

They cool the inlet air by several degrees. But they send the humidity of that air up considerably, and this cancels out the benefits of the cooling effect when it is very hot. The ‘Heat Index’ is the key detail, as explained above. In the case of the InstaChill, it will add a lot more humidity than the ChillMax, and as I have explained and demonstrated, the ChillMax is bad enough when it comes to increasing the ‘feels like’ temperature.

Only the air being directed at you is cooler. Once that slightly cooler air has passed through warmer air, it’ll be close to ambient again. The device cannot cool down a room. It’s far too small for that.

Humidity can carry much further, though. So in a small room, you could easily increase the ‘ambient’ RH without any cooling at all, and that will make it feel even hotter. If it is already hot, the amount of water vapour the air can hold before reaching 100% RH will be substantial. The increased humidity of the outlet air does produce localised condensation, so you have to be careful to keep these devices away from electrical sockets where they might drip on them. They also contain a significant volume of water when full, so you don’t want to knock them over.

Should I buy one?

My advice is to buy a proper air conditioner (A/C). If anything costs under £200 it is not a proper A/C. However, it is possible some people might find the minor cooling effect and increased humidity of the Chillmax/InstaChill (and similar devices) beneficial, so the choice is yours. But for real cooling and dehumidification when it is hot, it has to be a proper A/C.


The empty bird box at nightI have a new toy. A birdbox with a camera fitted into it. I will be installing it outside over the next few weeks, and maybe I’ll get some roosting birds in the autumn and winter, but I’m hoping to get them nesting next year.

The plan is to get Blue Tits nesting in my box. If that works, I intend to get another box and entice our Robin, who is tame enough to fly against you if you’re out gardening to let you know he or she is there so you can feed him/her mealworms (he won’t take them from your hand just yet, but he’s getting close on that).

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The birdbox I bought is from Green Feathers. They also supply their kits through Amazon. I chose the deluxe kit, which includes the birdbox, Wi-Fi HD camera, and all the necessary accessories. I also bought the daylight LED lamp to illuminate the inside of the box.

It comes with excellent instructions, and is easy to assemble as long as you can use a screwdriver (and perhaps an awl or small drill), and it connects to the Green Feathers app equally easily. I had it running with a live feed to the app within a few  minutes. For most people, that’s really all they need. The app tells you when any birds visit (motion detection). The camera also has a microphone, so you’ll be able to hear any sounds the birds make. The LED lamp (optional extra) uses a sensor to detect daylight, and turns on during the day to give a true colour feed. At night, the LEDs turn off automatically, and the camera records in infrared (black and white). You can record the video stream and save it through the app, and you can also take snapshots. For most people, the birdbox and app are all that is required. But me being me, that wasn’t enough.

I am not a ‘millennial’, but I am computer literate (I have been building and repairing them for over 20 years). I cannot see the attraction of doing everything on your smartphone when you have a PC in front of you. Fine, getting a live feed of the birdbox to your phone is pretty cool, but this is a HD camera we’re talking about, and there is no way on God’s green earth that you can get a decent HD image on a smartphone. They’re just too damned small – especially iPhones, which most millennials seem to want to own at all costs.

So, once the system was running on the app, the next thing I did was download ONVIF Device Manager (Green Feathers cameras are ONVIF devices). It is a network video client, which means it can access and manage as many ONVIF devices you like. On running it for the first time, it immediately saw my BirdCam, and I was able to view the video live feed on my PC.

Then, I turned to my Synology NAS, and set up Surveillance Station. Now I know most people won’t have a NAS, but I do. Surveillance Station is software on the Synology NAS which monitors multiple video feeds, and allows recording and playback. It is mainly intended for security cameras, but it will work with any IP Camera (which Green Feathers cameras are). It, too, picked up my BirdCam immediately.

Note that ONVIF Device Manager and Surveillance Station are completely independent of each other, and have little if anything to do with what I wanted to do next (ONVIF did help me identify my video feed address). ONVIF Device Manager was simply playing around (and understanding what was happening), and Surveillance Station would provide an alternative if what I did want to do next turned out to be difficult or prohibitively expensive.

My main aim was to be able to put a live feed of my BirdCam on the blog.

I’ve not done anything like this before, though I knew it was possible. But how? My first thought was that I could provide the feed directly from my computer, but my internet provider might not be happy (or capable of it) if I tried to do it through my router, and my router might not be happy if more than a couple of people tried to view the feed at the same time. It was clear that I needed a media server service, where I provided a single feed, and the server managed the necessary bandwidth and distributed it to others.

To that end, after some searching – and being put off by silly prices – I came across ipcamlive, who do just what I wanted. I’d got this far on my own, but I have to admit I needed to contact their technical support a couple of times to get it working. However, thanks to them, I can now be certain that I can do a blog page with a live BirdCam feed on it.

Right now, all I have to do is bolt the bird box to the shed and I’m set to go. And hope that some Blue Tits like the location enough to set up home next spring.


Can you believe this one? It happened today on a lesson. We’d just driven through Bestwood Village and were heading towards Bulwell.

We stopped at the traffic lights at the junction with Hucknall Road, and it was tipping down with rain. Then, a motor hearse drove through the junction just before the lights changed to red. I was just commenting that the day was already depressing enough, when it was followed by a horse-drawn hearse, which went through the the lights when they were probably on red. Then, a second horse-drawn hearse went through – and the lights were definitely on red this time, since ours were now green.

But what happened next was unbelievable. The hearses were being followed by a large convoy of mourners, and they proceeded to go through the lights while they were on red. The blue car in front of us pulled out when our lights turned to green, but then, one of the convoy went through red lights in the other lane to deliberately stop anyone from turning. The blue car blocked the junction, through no fault of his own, and had to reverse back when the assholes on the other side – who could see clearly what had happened – started sounding their horns at him when the lights changed again their side.

The convoy continued, and even after our lights went green again, they still continued through the red! They were all driving with their hazard lights on, so any signals were absent, of course.

Once we turned off Moor Bridge, I told my pupil to stay left, because there was no way we were going the same way that they were (they were either heading for High Wood Cemetery or Bramcote Crematorium). But even then, another one of them deliberately moved into the left hand lane to stop anyone passing.

And when we got to the junction with the A6002 – where they were all going – a white Volkswagen Golf GTi was blocking the junction again so that the convoy could proceed unimpeded!

Nottingham Police still do not accept dashcam footage unless you send them the SD card by carrier pigeon (and at £80 a pop, they can stuff that), but just in case they fancy getting off their fat arses and following any of this up, the registration numbers and vehicle details of some of these twats were as follows:

SP60 ULH – Silver SEAT Altea

GN63 GXX – White Audi A1 Sport

BL06 OCO – Black Lexus IS 220D

DE04 LGK – Silver BMW 320D

YG20 KFT – White BMW 118D M Sport

OY17 XOS – Grey Audi Q3 SE TDi

CE66 COH – White BMW X5 XDrive 40D

FH68 CYJ – Grey Volkswagen Tiguan SEL TDi (this one blocked the left hand lane for a while)

KN53 JVG – Black Ford Fiesta (this was the twat who blocked Moor Bridge to start with)

BJ06 AUL – Grey Renault Megane

CH08 LAN – Blue Maserati Levante D V6

SA17 ULU – Grey Vauxhall Corsa SRi Ecoflex

RF66 WHT – White Volkswagen Golf GTi (this one was illegally blocking the A6002 junction)

These are just the ones I passed – cleverly having their hazard lights on to identify themselves on camera. At least nineteen of them went through illegally in the initial convoy, plus the two horse-drawn hearses. Some were complete pimpmobiles.

Funeral processions obviously happen. But funerals are also personal – and there is no way they should be inflicted on anyone else, and especially not like this. Standard protocol (unless you’re a complete prat) is that you drive normally to the gates of the cemetery, then you can do the solemn stuff once you’re off the road and not inconveniencing the rest of the world. You do not – unless you are one of the aforementioned prats (which these clearly were) – do what happened here.

Those involved in this pathetic show probably had numerous offences against their names already. If the police get to see this, they might get a few more. And deservedly so. It was a show of utter arrogance, created danger and inconvenience for everyone else – and all because they wanted to show some stupid clannish affinity with someone had died.

But they were just stupid pillocks.


This one happened a couple of weeks ago. I was on my way to a lesson, and turned into Mabel Grove in West Bridgford.

Mabel Grove is a narrow road, and only one car can pass each way at the best of times. So when I take my pupils down it, I always make sure they understand the importance of checking down the road before they turn in.

I immediately saw a van was blocking the road completely. It turned out he was making a delivery to a house that is being refurbished (probably a student HMO). I didn’t know that – I assumed it was a courier dropping off a parcel – so I turned in and parked so he could move away again once he’d finished.

As it happened, the van was making a delivery of building materials. Ironically, there was space either side for him to park, but the driver (‘boss’) was the SIlverback Mountain Gorilla type of tosser, and he chose to just stop and block the road, with no thought for anyone else. He was accompanied by an apprentice or trainee tosser, who walked slowly after each package of material was delivered to collect another, whilst glancing up and down the road at the tailback he and his mate were causing.

The house owner (or landlord) would have been completely aware of the delivery, and should have cleared their driveway to make things even easier. But they didn’t.

They had a full van of building materials, and they took their time. I stress, while blocking a significant through route.

In the video, once I’ve stopped, I’ve switched to time lapse. It took them a full ten minutes to finish, and another five minutes for the queues to clear. They did not hurry one bit, and it was all coolly calculated to be inconvenient – especially after I got out after five minutes and told the apprentice tosser they were just taking the piss (which they were).

They worked deliberately slowly. The apprentice tosser looked at the traffic each time he slowly – very slowly –  walked to and from the van, clearly highly impressed with the arrogance he and his Silverback Mountain senior were exhibiting. People were getting out of cars to remonstrate and take photos.

Once they’d finally done, they calmly and deliberately sparked up to hold things up a little longer (and after the apprentice tosser had told his Silverback Mountain senior what I had said), and waited a little longer before moving away. No hurry, just deliberate stupidity.

There are some very, very sad creatures who are classed as human in this world. These were two such.

The van was a Peugeot Boxer 335, registration number CK17 WPN. The two occupants were registered at Twycross Zoo as exhibits in the monkey cages.


Last week, I was going to a lesson in Clifton and caught this near miss on my dashcam.

When you consider what the blue car was, and the speed he shot off at across the mini-roundabouts once the taxi turned off, the FedEx driver was nearly involved in a very unpleasant situation.


Another recent one, this time on the A453 near Clifton.

My pupil was travelling at the speed limit (in fact, I’d told him to watch his speed as the GPS nudged 41mph). Then this van sped past, and flew across three lanes in those weather conditions. It was a silver Vauxhall Vivaro 2900 Sportiv, registration number FE65 LYG. Since we were doing 40mph, what does it look like he was doing?


This happened recently on the Priory Roundabout in Bramcote. The twat in question was driving a blue Mercedes GLE 450 AMG, registration number LN20 KYS.

Note that they used the right-turn only lane, and then cut in. It was completely deliberate, because as the title says, they are an arrogant tosser (as well as an awful driver, and probably known to the police).

Makes my blood boil, it does!

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