Ok its a subject thats been covered but with so many conflicting opinions its confusing, so in a brief nutshell

MR X owns 2 cars one is wrotten one is good, can all of the parts from the wrotten one be fitted onto the good shell and also move accross the wrotten ones ID legally ?, or is it a case that the donor vehicles ID needs to be retained as its already vin tagged as I was informed if 80% of original cars parts were transfered then original ID could be swapped too, just wanted some clarification as its no bother either way just dont want MR X to fall foul of the law or get it called a "ringer" etc