Sat waiting for my MOT fail list :(

[burnmw]

That was my understanding of it too, in fact I have driven around after failing a test.
It was only the 'exhaust to loud' which I failed on, so I just went somewhere else an passed straight away.

Obviously if you fail on bald tyres and stuff, then continue to drive and get pulled you're in trouble.

Agreed, or something like brakes not up to standard or something. I think it'd be your discretion but you'd be daft to drive with serious faults.