Thames Young Mariners (Ham Lake) is another “home” lake which has resumed taking bookings in 2021. It has a 500m loop (smaller when the temperatures are a low at the beginning and end of the season). Covid-permitting, Windmilers will be resuming their legendary summer relays – nothing serious and the teams are handicapped according to swimming strength to try and ensure a thrilling, anybody can win finish!

Established over 60 years ago, this 25-acre site includes a 10-acre lake, alongside the River Thames, between Richmond and Kingston. Thames Young Mariners is surrounded by 200 acres of public open space, which has been designated as a local nature reserve. The site is managed by Surrey Outdoor Learning & Development (SOLD).