This is a very good point. Although I don't live in London. It may happen there
I did have a go at someone once - I was reading my metro as I walked over millenium bridge and the c+++ overtook me and then cut right back in and slowed down so that I walked into his heels. The bridge wasn't crowded so there was no excuse.
edit - I think I actually just used the t+++ word.
I think he was off to his day job as a quant...