Members of Spalding Triathlon Club took part in the Great London Swim at the Millwall docks.
Nine of them participated in the annual mile swim, which goes on for six hours, with groups taking the plunge every 30 minutes.
The open water swim, previously at Victoria Docks, can be tricky as there are so many people in the water at a time, visibilty is not great and swimming in a straight line is not always possible with people going off in all directions.
With arms and legs everywhere, it can be an unnerving experience but all members completed the course and recorded some great times.
Results: Bethany Walker 24.12, Nikki Balding 26.25, Martin Halifax 27.19, David McGill 28.21, Angela McGill 28.39, Neil Walker 29.13, Fiona Kelman 33.42, Jane Halifax 33.59, Ron Flewett 45.38.
n Aimee Stocker qualified for a Great Britain place at the World Championships after her performance in the Henley Half Triathlon, which consisted of a 1.9km swim, 90km cycle and 21km run.
The swim was an out and back course along the River Thames.
Although Aimee classes swimming as her weakest discipline, the river swim suited her and she finished in 38.18.
The cycle was on undulating, closed roads around the Chilterns, with over 2,600ft of climbing. Aimee put in a strong ride, making up 97 places and clocking 3.07.26.
Aimee was apprehensive about the run as she had hadn’t competed in a half marathon in over two years.
But she managed to finish in a time of 1:49:52, knocking 12 minutes off her previous PB.
There were over 1,300 athletes competing on the day and Aimee finished in a time of 5.40.56, seventh in her category, 17th woman overall and qualified for a GB slot in the World Championships at middle- and long-distance level.