Several people have been injured after explosions on the Underground network and a double-decker bus in London. A police spokesman said there were "quite a large number of casualties"
http://www.guardian.co.uk/transport/Story/0,2763,1523084,00.html
http://news.bbc.co.uk/1/hi/england/london/4659093.stm
Just got an email from the channel 4 new service I subscribe to that says:
London Underground has suspended all services following reports of explosions near Liverpool St and Edgware Road this morning.
We are also receiving news of explosions on a number of buses including one in Tavistock Square - and further explosions on the Piccadily Line near King's Cross.
Emergency services were called to London's Liverpool Street Station after reports of an explosion shortly before 9am.
British Transport Police said the incident, reported at at 8.49am on the Metropolitan Line between Liverpool Street and Aldgate.
London Underground said: "The network has been suspended until further notice and all stations are being evacuated.
"This follows major incidents at Liverpool Street and Edgware Road (Hammersmith & City) stations. Emergency services are on site and are working closely with London Underground."
ETA - Brighton and Swindon railway stations closed - anyone know more about that? Seems to be (sensibly) to prevent people going into London.