Westhorpe Water Sports, Little Marlow, Bucks, SL7 3RQ

Open from Monday May 5 to Saturday 30 August in 2014, Westhorpe Watersports offer four sessions per week on Monday and Wednesday evenings from 17:00-20:30, a race series on Thursday evenings, and an Aquathlon series on Saturday mornings. Wetsuits must be worn, although you can seek permission to swim without, and there is a clubhouse at the lake without changing facilities.