Whitecap Leisure, a trading subsidiary of The Parks Trust, manages a full range of watersports and leisure activities at Willen Lake South, Milton Keynes.  Willen Lake South attracts more than one million visitors each year to take part in watersports including sailing, paddlesports and windsurfing, as well as many other activities.

http://www.theparkstrust.com/whats-on/willen-lake
on/willen-lake for more details.