This happened to me, although my car was parked on the road outside my parents house, soemone crashed in to my car, punted it 3 doors down the road (detached houses!) and drove off!! Luckily the nobber left his number plate and the police caught him, he was uninsured no tax but HAD registered the car lol.... I hope they now test products on him rather than animals.....
Anyway, I used the MIB and got the full value of my car back, and I got to keep the car which I sold for parts... Took about 5 months for the cheque but got it all in the end