Anyone can look up the MOT history of any vehicle here.
https://www.gov.uk/check-mot-history
That said what the ‘witness’ said in the press is that the number plate matched a photo of Dominic Cummings car (or the make, model, presumably colour and first five digits of the licence plate on an image that showed up in a google search. A bit of an odd thing to do, but not a crime.
I’m not sure the relevance of him being a Labour activist. Either Cummings was in Durham or he wasn’t, and if he was the Government either wilfully mislead the public yesterday or didn’t bother asking Dom the obvious question - look mate if we send folk out to run
defense what else are we going to find.
It could get worse if there’s photos or potentially a third rumoured trip to Durham comes to anything. It would certainly call into his judgement if he was wilfully just flouting the lockdown when he knows millions of people voted for other political parties. Schoolboy error.