Hi,
If anyone can offer guidance with this I'd be grateful as I'm getting fed up now 
We are purchasing a property where a car crashed into the side wall (a non load bearing wall). The vendor claimed on the insurance, and got the work done from a builder but did not seek building regs approval for this work. The only bit of paperwork he has for this work is a structural engineer's survey carried out before the repair work and an invoice from the builders once the work was completed.
We feel that building regs should have been involved, if not at least certification from the insurance company saying the work was up to scratch or a structural engineer's report or builder's guarantee of some e form!
But vendor is saying he has none of these things as they were not required. We have suggested getting an indemnity policy, not just to cover us in case the council approach us but also if there are issues with the quality of the work. (The mortgage lender has not requested this btw.)
The vendor didn't disclose any of this prior to us making an offer, it only came out after a mortgage valuation survey, annoyingly 
My question is are we going about this the right way, is this all we can do? I just don't understand why he didn't get building regs involved in the first place but I don't see what other options we have? Does an indemnity policy work in this way?
TIA