Mr Blair has just confirmed live on the BBC that it's a terrorist attack.

There's a tube train stuck at Kings X and a rescue operation going on.

Londoners are being asked not to travel, the whole of the underground has been closed and buses in central London have been suspended.

I've just seen a fleet of ambulances from Berkshire going by. There doesn't seem to be much panic, local residents and businesses are rallying round, giving folk hot drinks and looking after those who are just shocked. Walking wounded are being ferried to hospital in buses, saving the trained staff and ambulances for those in greater need. More buses are being used to treat minor injuries at the scene.

Mobiles are still off in some areas and landlines are being affected in some areas too, so don't worry too much if you can't get through.

As Lynne says most of the city is fine just horrified at the news.

Fiona