So I recently had a conversation with Thames Valley police and it seems that the dealership I bought my car from have apparently failed to get the paperwork to the dvla or the dvla have fluffed it.

I am now also receiving an mot reminder for a car I've never owned that would be due about the same time as I thought I was going to need my current car squared away.

Anyone know how to proceed?

Are you under any pressure as a consequence of the convo with Thames Valley Police?

I think you need a chat with (a) the dealer and (b) DVLA. I believe that, where a person claiming to be the Keeper has no V5 they can request re-issue. DVLA will write to the last recorded address asking them to speak up if they still claim car is theirs.

A similar thing happened to my son. Bought new car from a large dealership early last year. Never got the V5 back but being The Lad he either didn't notice or failed to let it be a priority. In the meantime he gets caught by a speed camera. Merseyside Police send the usual notices to the address on DVLA records. Eventually lack of response leads them to knock on the door of the address at DVLA. Turns out to be same flat number but in a different block on the same road. Near enough though that somebody recognises the car and sees its owner entering the block on the corner.

In the end the speeding offence was 'wound back' and The Lad was offered a course.

Eventually sorted the V5 with help from the dealer who held up their hand.

I think the MoT reminder is a red herring; they're produced by MoT stations and not DVLA.