There were well over 400 people and 66 teams taking part.
The Championship is organized by and located at the Tooting Bec Lido in South London.
Both the clubs are getting bigger and bigger as many young people are choosing to join them.
Age and ability is no bar.
Yvonne Wood was the oldest competitor of the day aged 88 who took part in the female heads-up breaststroke.
Her husband Cyril, 87, took part in the equivalent men’s race.
They are both members of the local South London Swimming Club.
Participants taking dip in a hot water tub after the competition.
Photos: Tom Jenkins forThe Guardian