David Walliams
Media playback is unsupported on your device
Video

Comedian David Walliams struggles with Thames swim

David Walliams has just started day three of his attempt to swim the length of the Thames for charity. He is hoping to cover the 140 miles from Gloucestershire to London in eight days.

Walliams has taken on the River Thames swim as part of the Big Splash Challenge for Sport Relief.

The BBC's Louisa Hannan caught up with David as he set off from Abingdon Lock in Oxfordshire. Leaving a few hours ahead of schedule David said the swim is starting to take its toll.

Go to next video: David Walliams: The new Roald Dahl?