Writing for radio really focuses the mind, because you can't rely on thinking "Oh, just pull a funny face at the end of this sketch." You've got to try to work on the words.

I have always liked shows that have laughter in them.

I don't have a fear factor. Well, not much of one. And I'm willing to risk quite a lot - as a comedian, you're always risking a lot. You're risking failure, especially if you're improvising and going on TV shows trying to make comedy out of thin air. That is quite a risky business.

It was impossible to sleep. Anxiety stopped me from falling asleep; depression woke me up.

It can be difficult to be subtle and not cartoony in prosthetics. But when you see characters like Bubbles and Desiree from 'Little Britain' on screen, it makes all the hard work worth it. It's such fun watching those transformations.

I don't get recognized much, and am very happy with that. The fans I have met have all been delightful.

I've done panel shows, which I enjoy, and on those you're recording half-an-hour of TV and sometimes they film for two hours. But with 'Britain's Got Talent,' you're on camera for eight hours, with a large theatre audience watching - and in between you're being filmed for ITV2 as you eat your lunch.