Like buses really, you don't get one for ages and then 18,500 come along at once. Well, that's the numbers the organisers say, I expect The Police will claim it's about 5,000, that's what normally happens with demos in Central London.
All those years when I used to go on marches and we'd be surrounded by police, now I'm surrounded by police and I'm not demonstrating. Speculation is rife - will there be a baton charge and if so, who will charge whom.
Police in protest rally over pay
My camera is at home...
Newsbiscuit says Police break up police protest