The BBC is reporting that a series of explosions rocked central London this morning. Major incidents are reported at Edgware Road, Kings Cross, Liverpool Street, Russell Square, Allgate East and Moorgate. There are, as yet, no indications as to the number of casualties.
My eldest son just rang to say he's safe - he's visiting London with his friends and they were planning on going into the center today. They're not going anywhere now: the Underground has been closed and there are no buses running in central London.
I've told him to stay put, anyway. And when he's ready to come home, I'm going to go get him.
BBC News are being very cagey about it, but it looks very much like a co-ordinated terrorist attack. It was always a possibility and London's emergency services have trained hard to deal with incidents of this kind. It looks like they're responding well to the crisis.