I have just bought a 1997 Land-Rover Discovery for towing my trailers. It is currently off the road and is SORN'ed. I have insured it today and will book it for an MoT on Wednesday, when I collect it from the seller who is 40 miles away, at the MoT station about 3/4 of a mile from my home. However, I've not driven the car and I shall call at my home for a cup of tea on the way to the test station and whilst there I shall jack the Land-Rover up and have a 'poke around', check all the lights (they were working on Saturday), inspect the brakes and see if it all looks OK. If it doesn't I'll cancel the test, do the work, then re-book it when I've fixed it.
If stopped by the Old Bill I can honestly say I'm on my way to a pre-booked MoT, and I can see no reason why stopping at my own home especially as I actually have to pass my front door on the way to the test should be in any way illegal, not that I am really bothered.
I've often wondered what the situation is if the car breaks down on the way to a pre-booked test. is it OK to tow it home to repair it, or is that then illegal? I doubt the Old Bill or the DVLA know the correct answer to this. Another grey area of legislation. I once had a windscreen break on the way to the test in a tax-expired SORN'ed car, but I carried on and got a windscreen replacement company out to the test station to fix a new screen so that it could pass, which it did.