When you are doing endurance swimming you just need to take in as many carbs as possible to put on as much weight as you can. Basically you can eat whatever you want, which can be quite fun. Everything is guilt-free.

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Walliams does a track-by-track interview with Neil Tennant and Chris Lowe on the new Pet Shop Boys album Elysium. In 2003 he appeared in EastEnders and Marple. In September 2012 Walliams released his fifth novel for children Ratburger.

He is best known for his partnership with Matt Lucas on the sketch show Little Britain and its predecessor Rock Profile. He is a judge on Britain's Got Talent and he compèred the 2012 Royal Variety Performance.