I then realised it wasn't quite so simple, because the B pillars, to which the door hinges were mounted, were set further inwards than a standard P type, which meant the rails on which the doors would now sit were in the wrong place and the doors wouldn't fit.   Also the doors that came with the car had been adjusted, and swapping them out for original doors to give me the correct top profile meant they didn't fit. An original P1 door for comparison a cut down door, note position of rear hinge edge
#6807
Ben Stevens
Keymaster

I then realised it wasn’t quite so simple, because the B pillars, to which the door hinges were mounted, were set further inwards than a standard P type, which meant the rails on which the doors would now sit were in the wrong place and the doors wouldn’t fit.   Also the doors that came with the car had been adjusted, and swapping them out for original doors to give me the correct top profile meant they didn’t fit.

An original P1 door for comparison

a cut down door, note position of rear hinge edge