Received our '1st' letter today also, regarding this aspect. As Johncb500 mentions, it is good system works. Well, can say system certainyl works as we bought our car as 'cat c' and cost 50% of cost of similar car. (Don't really know why buying a 'cat c' car should mean makers of cars no longer know who has car, as this info is kept at DVLA!
Anyway, glad that they know of 'new owner' and like rest wil wait for them to get in touch again once they have parts etc.