Template:Infobox lake The Wraysbury Reservoir is a water supply reservoir for London lying just west of the M25 near the village of Wraysbury and Heathrow airport. The reservoir was begun in 1967 and completed in 1970 with a capacity of 34,000 million litres.
The reservoir is owned and operated by Thames Water and 400 million litres of water are pumped daily from an inlet at Datchet on the River Thames. A neighbouring reservoir is the King George VI Reservoir, opened in 1947, which is supplied from Hythe End. To keep grass on the reservoir short and make inspections easier, Thames Water maintains a flock of sheep on the earthen banks.
Wraysbury Reservoir is within a Site of Special Scientific Interest which also includes gravel pits at Wraysbury.
- London water supply infrastructure