Брентское водохранилище: история и современность

The Brent Reservoir (popularly called the Welsh Harp) is a reservoir in North West London. It straddles the boundary between the boroughs of Brent and Barnet and is owned by the Canal & River Trust. The reservoir takes its informal name from a public house called The Welsh Harp, which stood nearby until the early 1970s. It is a biological Site of Special Scientific Interest (SSSI), the only SSSI in either borough and among more than 30 SSSIs in Greater London. The reservoir is fed by the Silk Stream and the River Brent. Its main outflow is the River Brent. Its smaller outflow is a feeder channel to the canal system. It holds an estimated In 1994 when the reservoir was drained more than of fish were captured, 95% of which were roach. However, fishing is prohibited. The reservoir has a sailing centre, home to Welsh Harp Sailing Club, Wembley Sailing Club, the Sea Cadets, and the University of London Sailing club. In 1960, it also hosted the Women's European Rowing Championships. The reservoir also hosts the Phoenix canoe club and outdoor centre.

The reservoir is adjacent to the A406 North Circular Road (outside it) and the A5 Edgware Road, and a short distance to the north east of Wembley Stadium. Residential areas around the reservoir include: Neasden, Kingsbury Green, West Hendon and Cricklewood.

Plans for the construction laid in 1803 were abandoned because of cost. Canal branches and wharves continued to be dug in the early 19th century. Regular traffic meant lock openings draining the local canals (several feet above sea level) leading to canal water shortages. By 1820 there was not enough water to supply the Grand Union Canal and the Regent's Canal so having obtained an enabling act of Parliament in 1819, the Regent's Canal Company decided to dam the River Brent to create a reservoir and cut a feeder channel from it to an upper point on the Grand Union Canal. It now holds an estimated
The reservoir was constructed by contractor William Hoof between 1834 and 1835. The water flooded much of Cockman's Farm, to supply the Regent's Canal at Paddington. Its owner gave it the name of its then parish: it was named Kingsbury Reservoir. At first it was between Old Kingsbury Church and Edgware Road. Hoof, under the tender awarded for the work (including the construction of a bridge), was paid £2,740 6s 0d (2740.3 in 1834 is equivalent to about <calculated amount> in recent years). Additional building was completed in December 1837 to extend the reservoir. In 1841 after seven days of continuous rain the dam head collapsed, killing two people. It was after this that a supervisor was employed for the first time, with a cottage near the dam, which remains. At its greatest extent it covered in 1853. It was reduced to in the 1890s; later to
In 1859 the famous Welsh Harp tavern was built on the site of an earlier coaching inn called the Harp or the Harp and Horn. The tavern was demolished in the 1970s, but the reservoir is still colloquially named after it.

During the second half of the 19th century the area became a destination for recreation and evening entertainment, almost entirely due to W. P. Warner (1832–1899), who in 1858 became licensee of the Old Welsh Harp Tavern. The tavern stood on the Edgware Road, near where it crossed the Brent. Warner, who fought with distinction in the Crimean War, created the tavern along the lines of the London pleasure gardens (ironically at the same time when the most famous of all, the Vauxhall finally closed). For 40 years, Warner made the Old Welsh Harp Tavern one of London's most popular places and it was celebrated in song by the music hall star Annie Adams as 'The Jolliest Place That's Out'. The amusements were focused not just on the inn, but around the reservoir. Warner operated a race track until an Act of Parliament made it illegal. The first greyhound races with mechanical hares took place here in 1876. In 1891 Capazza attempted to launch his Patent Parachute Balloon – it failed to take off and accounts record 'nasty incidents' among the 5,000 spectators. These activities attracted a mixed clientele and crime and violence were not uncommon. One observer described the races as a 'carnival of vice'. The reservoir, like nearby Hampstead Heath, was also famous for Bank Holiday fairs. During its Victorian heyday a bear escaped from the menagerie.

The reservoir was popular for speed boat and other water sports, until its size became unsuitable. The reservoir has a sailing centre, which is home to the Welsh Harp Sailing Club, Wembley Sailing Club, the Sea Cadets, and the University of London Sailing club. It also hosted the 1960 European Rowing Championships, which that year was for women only as the men competed at the 1960 Summer Olympics instead. More than 200 competitors and officials attended, with 5,000 spectators. The Phoenix Club provides: Canoeing, Kayaking, Bell Boating, Raft Building, SUP (Stand up Paddleboard), Sailing and powerboat to members.

The first formal cycle race was held at the Welsh Harp grounds on 1 June 1868. It was won by Arthur Markham. He received a silver cup from the licensee of the Welsh Harp Hotel, the sponsor of the race. For many years Markham had a bicycle shop at nearby 345 Edgware Road.

In past winters the reservoir froze for skating; national and international ice skating events were held. In February 1893, Jack Selby drove a coach and four horses across the reservoir. Towards the end of the 19th century, urbanisation led to fewer informally organised frolics. This is referred to as "The Sun Bathing Riots".

The Midland Railway built its Welsh Harp station in 1870 on its new line from Bedford to St. Pancras. The area lost its attraction with the development of West Hendon between 1895 and 1915 and the station closed in 1903.

The Mechanical Warfare Department, part of the War Office based nearby in Cricklewood, used the Welsh Harp for secret tests of a new weapon from 1916: the tank, especially the amphibious Mark IX tank. Early film of these tests was shown on British television in the late 1990s. During the Second World War, a seaplane kept on the reservoir was rumoured to be an escape route for the prime minister. Local residents have recounted swimming to the plane. mainly due to the diversity of breeding waterbirds. The reservoir and much of the surrounding area are a Local Nature Reserve and a Site of Metropolitan Importance for Nature Conservation.

The reservoir is an important site for breeding waterbirds such as great crested grebe, gadwall, shoveler, common pochard, tufted duck and common tern. At one stage, the reservoir was second only to Rutland Water for the most breeding pairs of great crested grebe in the UK. Other breeding birds include eight species of warbler. In 2008, the first nesting attempt by great cormorant took place as well as the first nesting attempt by grey heron for several years. Neither attempt was successful, but grey heron have bred successfully since 2017. The reservoir has always enjoyed a reputation for rare birds. As well as those documented above, it attracted two black winged stilts in 1918; the first great white egret in London in 1997; the blue winged teal in 1996; the lesser scaup in 2003; and penduline tits in 1996 and 1997. Remarkably for an inland site, it also attracts rare vagrant warblers, notably the aquatic warbler in 1955, Hume's warbler in 2004 and yellow browed warblers in several winters since 1994; however, most significant was an Iberian chiffchaff on 3 June 1972, the first recorded in the UK. The current list of birds recorded at the reservoir numbers 253 species. The most recent species added to the list are Caspian gull (2015), Ring necked duck (2017) and cattle egret (2018).

Many other forms of wildlife have also been studied and were documented in the Birds of Brent Reservoir. There have been 31 species of butterfly at the reservoir, including breeding marbled white and ringlet, the closest site for these to the centre of London. The most recent addition was brown argus in 2015. Scarce species include a single dark green fritillary in 1999. Prior to the construction of the reservoir, marsh fritillary used to breed. Dragonflies and damselflies have been studied and 15 species have been seen, of which 12 breed at the reservoir.

The small list of the mammals is documented in The Birds of Brent Reservoir. There is access from Aboyne Road and from the North Circular Road, opposite Brook Road and close to Staples Corner.

Welsh Harp Open Space is a park and nature reserve of on the north west shore. It was established as a recreational area in 1965, and received a Green Flag Award for 2010–11. There is access from Birchen Grove. In the late 19th century, this area was served by the Welsh Harp railway station.