This is why this the spread of CCTV enforcement is wrong, because often you won't have realised your error, for example: if you stop to read the restrictions on the sign in a CCTV zone, you'll get done; likewise, if you pause to look at a map, or drop off an elderly relative at the tube station, as I did once, you'll get done and you won't know until the fine arrives at your door, or not, in Ratpack's case. And they can't read disabled badges, so you're presumed guilty until you present your credentials to the council, or bailiffs. CPZ, anyone?