OK thanks both for the advice. I rather doubted these was anything I could do on this one. I don't doubt I was doing 30 mph. I can't remember when the speed limit changed on this section of the South Circular but when there is no traffic jam it's a relatively fast road and hence easy to be caught out by a 20 mph limit. Ironically I used to do this section in the opposite direction taking my son to school from time to time (and then going on to work) and was quite aware of the positioning of the camera but I was not sufficiently alert coming in the opposite direction and having ridden all day from Germany.
I last did a Speed Awareness course probably 8-10 years ago so that's OK. I take it 30 mph in a 20 limit is close enough to qualify?
How do I redact a post already made? I cannot see an Edit button anywhere? I agree that having the Ref and Passcode out there isn't such a good idea. Or can a Moderator do this for me?
I was aware that NIP Wizard was a feature of Pepipoo and thought with the number of references to it on this site that it was here also but clearly not.
Here's a GSV ref to where I was nicked for what it's worth. The camera is clear enough.
51.443725,-0.118909 @ Instant Street View