Boris Johnson wants to be an MP, his adviser wants him to stop talking

Here's Boris Johnson being interrupted mid-interview - by his own adviser.

The Mayor of London, who announced today he plans to stand as an MP, was talking to Channel 4's Cathy Newman about whether Britain needs another old-Etonian in parliament when he was interrupted.

"That was a jolly good answer, that was a vintage answer, he says. I'm being interrupted by my own spin doctor", Mr Johnson said.