Thanks Rivet, I think 99 times out of a 100 it wouldn't be an issue but we have a tight 1 way system here. This is part of what ask the police says;
'It is important to remember that in committing the offence (crossing the stop line) the onus will be on you to provide evidence that you did so...
I was just trying to clarify this myself. It's an offence to go through a red light unless instructed to by the emergency services and yet it's an offence to obstruct them.
A contradiction surely?