My mum just called me to make sure I was okay after the explosions in London. The tube's been shut down, and the mobile network's overloaded (voicemail's busy too... "you have ... one ... new ... message ... beep ..." ;-)
I'm okay, and might whizz out and see what's happening.
Update: (12.15pm) Tony Blair's just said it is terrorism (rather than the "power surges" flannel reported earlier). Apparently the European arm of Al-Qaeda? had claimed responsibility, but that's still to be confirmed as genuine.