Vehicle currently has 5 seats (the pics above aren't of mine). It does seem like it is the seatbelt that is the problem I think - as apparently it is the combination of seat belt and vehicle that has to be type approved and it wouldn't be for the Puma as LR wouldn't have put it through this process. I think I'll have to try and ring the DVLA and understand what, if any, inspection they would want to give it.