Daleks head for Westminster, traffic delayed

Of all the strange reasons for transport delays - freak snowstorms, the wrong kind of leaves, stray pets - a moving fleet of genetically modified robotic mechanical shells is not usually one of them.

But Transport for London tweeted today: "The filming of Doctor Who has finished at Westminster Bridge, the Daleks are in the process of being removed."

If an invasion of London has begun, the authorities can't be accused of over-reacting.