Well, one man was shot by police as he was running from them. They got him on the floor and shot him in the head.
It's some thing the police will use now with supected suicide bombers as it will shut down the nervous system immediately so they can't detonate.
More info can be found here.
http://news.bbc.co.uk/1/hi/uk/4706787.stm
Anyway, i'm off for the weekend, into central london as it happens. Hope nothing happens while i'm there.