One thing you all have to bear in mind on this one is that when someone applies for a log book though the DVLA a letter is sent to the original owner, in which time all they need to do is ringthe DVLA and say no thats still my car, then ownership isn't transfered.
So if GAZ applied for it properly then the owner should have recieved a letter and gotten plenty of time to sort it.
If they didn't, sorry, their loss, finders keeper. But what a find!!!