There are TV reports of "several explosions" across London, possibly about 6 blasts , according to Sir Ian Blai the Commissioner of the Metropolitan Police.
So far pictures of the aftermath at Aldgate Tube station ("90 casualties" / injured) and the top deck of a London Bus near Russell Square station have been broadcast.
The Government is saying 20 fatalities so far.
The public transport networks seem to be at a standstill.
There is talk of the Mobile Phone networks either being overloaded or being shutdown.