Tooting Bec Lido in South London Swimming Club hosts the 5th UK Cold Water Swimming Championships today.
With water temperatures as low as 1°C, jumping in for the 30 yard races is a challenge in itself.
More top news
Police want to find four boys seen on CCTV around the time of the attack.
Georgina Ferguson was on a carriage behind the one that was bombed. This is her very personal story of 7/7.
David Cameron unexpectedly appeared during a cookery segment.