At least one of the tube train bombs was detonated as another train was passing it in the opposite direction... this is what has caused the tunnel blockages and the additional reports. Seems they were set to or were detonated when the trains were in the tunnels rather than at stations where access would have been easier and disruption probably less.

All bus services are still suspended in central London (I'm reading this off the television screen, tuned to BBC) and Tony Blair has arrived in Downing St.

LTS