It was announced last summer that the DSA would merge with VOSA to create a single body. As of Wednesday, 2 April 2014, this change took effect and the combined body is now known as the Driver and Vehicle Standards Agency (DVSA).
There’s no information yet about when – and if – there will be a specific logo for the new body. The number of hits I’ve been getting on the blog asking suggests that this is important to a lot of ADIs for reasons which are unclear. Far more important is the financial impact – good, bad, or remaining the same – on those who use it.
For anyone who needs to contact what used to be VOSA or DSA, just use the same numbers and addresses you always did until new ones are announced. Outwardly, there is no real change at the moment.