Olympic Games Lanes

http://www.patrol-uk.info/site/scripts/documents.php?categoryID=2

This would suggest that even where a local authority has adopted traffic enforcement, the police can still choose to issue FPN.
I think you're right there.

And if a plod tries to stop you, you should stop.

Even plastic plod in London has the authority to stop you.

Are you any good with bunions?
You need to talk to Scoble.