Jerry O’Mahony is the manager of the Stoke Newington West Reservoir Centre , a water sports centre that offers an open water swimming facility in its reservoir in Stoke Newington, Great Britain. He oversees a 6-week Open Water Swimming Improvers Course beginning on 13 May. The course is aimed as an introduction to open water swimming at the West Reservoir Centre with lifeguard and kayak support. The facility is operated by Greenwich Leisure Limited that manages over 100 leisure centres for a number of local authorities in London and across south east England.