I know there's a part of the exhaust mount that I fixed with a cable tie. It's just odd, as I told both MOT testers about it and they both checked it with a crowbar etc and it was all tight. So the only thing I can think of is the exhaust. Which, I said previously, I'm going to get someone to fettle. It needs an inch removed from the pipe running to the back box which will bring it in line with the tunnel. And then, maybe, a hanger welded to the car just to make it secure. I mean, it's secure anyway, but more for peace of mind than anything.