It is popularly called the Welsh Harp . It is a reservoir that is fed by the Silk Stream and the River Brent and its outflow is the River Brent. It is said to contain enough water to fill 3 million baths, and in 1991 was believed to contain 10,000 lb (4,500 kg) of fish. It was popular as a resort for speed boat trials, and other water sports, until its size became unsuitable for such activity. The Welsh Harp Conservation Group was founded in 1972. Currently, the reservoir is a sailing centre and a wildlife reserve, popular with bird watchers.
