Theres been a number of explosions on the london underground and a bus was blown up a few minutes back. I have a few phone calls to try and make, I suspect some of you do too.
Edit - of course the BBC and Sky news are a bit hard to reach right now and no one is entirely clear whats happened. Sky is saying explosions, the BBC is going with power surges on the train lines. http://news.bbc.co.uk/1/hi/england/london/4659093.stm