Hi Mark - your post has been cut short, but I get the gist.
Your daughter really needs to speak to a claims manager rather than a handler. Seems fairly straightforward that she made a claim in good faith and Tesco accepted that the claim was genuine.
Had Tesco notified the relevant authorities (police, DVLA, MIAFTR) of their interest in the vehicle following the settlement, then they (and not your daughter) would have been notified when the vehicle was found. I can understand why questions have been raised as the circumstances are on the unusual side, but it seems to me that the whole claim is being dealt with by poor, over-worked, underpaid claims handlers who have targets to meet! Insist that the whole sorry situation is reviewed by a manager, insist that they treat it as a formal complaint and if they don't see sense, go to the Financial Services Ombudsman. The FSO view cases in the eyes of a 'layman' and in this case your daughter thought the car had been stolen, the police were happy that the car had been stolen and Tesco accepted that the car had been stolen - so where exactly is the breach? This is one for Tesco to sort out with JBW!
Good luck!