[12B]

Reuters reports Bus explosion at Tavistock Square (Police witness)

[Eurotwit]

Another one?

[Miss Marple]

CNN reporting bus explosion in the Bloomsbury area.

Reports of tube explosions at Russell Square, near Paddington, Edgeware Road.

[HiTech RedNeck]

Well unless the bus that blew is an electric trolley, that sure sounds like it has to be something worse than a power surge.