Quite often, one can be walking/cycling/driving through Parliament Square and see Brian Haw, the now world-famous protestor, standing in his underpants washing himself. Now it's not a pretty sight, and nor are some of his posters, but you have got to admire the man's conviction. Whether you think he's a champion of the anti-war movement, or a few sandwiches short of a picnic (he DID leave his family to hold his protest, which has now gone on for five years), Brian Haw and his placards are an institution.
The High Court seems to think so too. We reported a while ago now that Brian is exempt from the Serious and Organised Crimes and Police Act's clause that bans unlicensed demonstrations within a 1 mile radius of the Palace of Westminster because his protest pre-dates the Act. However, the Met Police are appealing against the decision.
Haw has been arrested more times than he changes his socks (oh, wait, how often DOES he change his socks?), but the Police have never been able to make anything stick, and Londonist is inclined to feel that the placards probably won't be coming down just yet.