"Could you not get in touch with the various councils? They will surely have somewehere a database of all their road signs, most likely including info on when they were last changed / replaced." I could do that although the few messages I have sent on similar matters have never received a reply. They'd probably quote the Data Protection Act and tell me they are official secrets. One person even suggested if we draw their attention to them it might even be their downfall, the law is a national one, originally designed to get rid of them all except the finger posts by 1997, then 2007. Clearly not done and sheer vandalism if had been, but Ken did his best when he got in in 2000 and removed many as a sort of middle finger gesture to London. The signs have worked perfectly well for over 45 years and if they are in good condition should be given preservation orders, not removed purely for 'following orders'. I emailed TfL asking them to do this and the more people who add their voices (clearly not including Jah Lush who is probably a lot happier down the pub or watching East Enders- hold on, am I being judgemental and prejudiced?) they may even listen now Boris has got in. Always worth a go though.