Sorry, but both my 90 (1988) and my Dad's 2004 110 have this problem, and I'm fairly sure it's a common issue.
Didn't realise I'd offend anyone by asking a Defender related question on a Defender message board.
So you're saying take the seatbelts out or remove the doors to solve the problem? Thanks, I can see Mr MOT man being happy with that I really don't see how it's the same question, you could apply your logic to anything.
Anyone got a real idea or solution?