Comedian Tim Vine 'exposes' a BBC studio backdrop on air

Comedian Tim Vine 'exposed' the backdrop of the BBC's Edinburgh studio, which shows the city's famous skyline, while live on air on the BBC's News Channel.

He was being interviewed by Emily Maitlis on the channel about winning the best joke at the Edinburgh fringe festival: "I've just been on a once-in-a-lifetime holiday. I'll tell you what, never again."