Behind the scenes at The News Quiz

On BBC News, Stephen Robb goes behind the scenes at Radio 4's The News Quiz.

Over two days up to the Thursday evening recording of The News Quiz, the writers each produce about 40 jokes - 10 for each topic.

"People say, 'How do you think of jokes?' but it's like asking a lorry driver, 'How do you drive a lorry?' It's automatic after a while," says Rhodri Crooks.

"The deadline seems to focus your mind," adds Simon Littlefield.

But the writers do admit to rituals that help them think, with Crooks disappearing for long walks, and Littlefield stepping out on to the balcony to smoke and gaze over central London rooftops.