Last updated at 11:48

David Walliams swims the Thames for Sport Relief

The comedian hopes to raise over £200,000 for charity.
David Walliams started his big swim down the Thames river on Monday. He hopes to raise loads of money for Sport Relief charities.
David Walliams begins his Sport Relief swim in Gloucestershire
He gets to take breaks along the way and aims to swim around 18 miles a day.
David Walliams takes a break on his Sport Relief swim down the Thames.
It's a tough challenge. Here's David receiving treatment after a long day's swim.
David Walliams receives treatment after a long day's swim for Sport Relief.
Swimming the length of the Thames can be pretty dangerous. Perhaps this man in the kayak is hoping to keep away curious swans? The river is also full of bacteria and David's already picked up a tummy bug - but he's vowed to keep on swimming.
A kayaker keeps watch as David Walliams swims down the River Thames
The route he'll swim down the Thames is around 140 miles long. David started the challenge at the river's source in Gloucestershire and he will finish at Big Ben in London.
David Walliams climbs out of the River Thames
But he didn't last long in his swimming trunks - pretty soon he changed into a wetsuit because the Thames was very cold and his skin was turning blue.
David Walliams in the water
Lots of people have lined the river bank to wish David luck with his challenge.
David Walliams greets fans offering support on his Sport Relief swim of the River Thames.
He also gets to munch on snacks to keep his energy levels up. He'll burn up 4,400 calories every day doing the swim.
David Walliams rests for a drink and a snack on his Sport Relief swim of the River Thames
David hopes to complete the big swim in eight days - and raise loads of money for charity. By Thursday, he'd already raised more than £300,000.
Rain pours down as David Walliams continues his charity swim of the River Thames for Sport Relief