The Brent Reservoir (popularly called the Welsh Harp) is a
reservoir
A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation.
Reservoirs are created by controlling a watercourse that drains an existing body of wa ...
in North West London. It straddles the boundary between the boroughs of
Brent and
Barnet and is owned by the
Canal & River Trust
The Canal & River Trust (CRT), branded as in Wales, holds the guardianship of 2,000 miles of canals and rivers, together with reservoirs and a wide range of heritage buildings and structures, in England and Wales. Launched on 12 July 2012, the ...
. 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
A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...
(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
The River Brent is a river in west and northwest London, England, and a tributary of the River Thames. in length, it rises in the London Borough of Barnet, Borough of Barnet and flows in a generally south-west direction before joining the Tid ...
. 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
Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the ''water'' (sailing ship, sailboat, raft, Windsurfing, windsurfer, or Kitesurfing, kitesurfer), on ''ice'' (iceboat) or on ''land'' (Land sa ...
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.
Location
The reservoir is adjacent to the A406
North Circular Road
The North Circular Road (officially the A406 and sometimes known as simply the North Circular) is a ring road around Central London. It runs from Chiswick in the west to North Woolwich in the east via suburban north London, connecting var ...
(outside it) and the A5
Edgware Road, and a short distance to the north-east of
Wembley Stadium
Wembley Stadium, currently branded as Wembley Stadium connected by EE Limited, EE for sponsorship reasons, is an association football stadium in Wembley, London. It opened in 2007 on the site of the Wembley Stadium (1923), original Wembley Sta ...
. Residential areas around the reservoir include:
Neasden
Neasden is a suburban area in northwest London, England. It is located around the centre of the London Borough of Brent and is within the NW2 (Cricklewood) and NW10 (Willesden) postal districts. Neasden is near Wembley Stadium, the Brent Reserv ...
,
Kingsbury Green,
West Hendon
West Hendon is a district of Hendon in North London, in the London Borough of Barnet. It is the NW postcode area, NW9 part of Hendon, located around the A5 Edgware Road and the Welsh Harp (Brent Reservoir). The area is known for the West Hendon E ...
and
Cricklewood
Cricklewood is a town in North London, England, in the London Boroughs of Camden, Barnet, and Brent. The Crown pub, now the Clayton Crown Hotel, is a local landmark and lies north-west of Charing Cross.
Cricklewood was a small rural hamlet ...
.
Construction
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
The Grand Union Canal in England is part of the Canals of the United Kingdom, British canal system. It is the principal navigable waterway between London and the Midlands. Starting in London, one arm runs to Leicester and another to Birmi ...
and the
Regent's Canal so having obtained an
enabling act
An enabling act is a piece of legislation by which a legislative body grants an entity which depends on it (for authorization or legitimacy) for the delegation of the legislative body's power to take certain actions. For example, 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
Paddington is an area in the City of Westminster, in central London, England. A medieval parish then a metropolitan borough of the County of London, it was integrated with Westminster and Greater London in 1965. Paddington station, designed b ...
. Its owner gave it the name of its then
parish
A parish is a territorial entity in many Christianity, Christian denominations, constituting a division within a diocese. A parish is under the pastoral care and clerical jurisdiction of a priest#Christianity, priest, often termed a parish pries ...
: 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 ().
[Birds of Brent Reservoir, 2001 ]

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.
Sport and recreation
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
The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
, created the tavern along the lines of the London
pleasure garden
A pleasure garden is a park or garden that is open to the public for recreation and entertainment. Pleasure gardens differ from other public gardens by serving as venues for entertainment, variously featuring such attractions as concert halls, b ...
s (ironically at the same time when the most famous of all, the
Vauxhall
Vauxhall ( , ) is an area of South London, within the London Borough of Lambeth. Named after a medieval manor called Fox Hall, it became well known for the Vauxhall Pleasure Gardens.
From the Victorian period until the mid-20th century, Va ...
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
hare
Hares and jackrabbits are mammals belonging to the genus ''Lepus''. They are herbivores and live Solitary animal, solitarily or in pairs. They nest in slight depressions called forms, and their young are precociality, able to fend for themselves ...
s 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
Hampstead Heath is an ancient heath in London, spanning . This grassy public space sits astride a sandy ridge, one of the highest points in London, running from Hampstead to Highgate, which rests on a band of London Clay. The heath is rambling ...
, was also famous for
Bank Holiday fairs. During its Victorian heyday a bear escaped from the menagerie.
Water sports

The reservoir was popular for speed boat and other water sports, until its size became unsuitable. The reservoir has a
sailing
Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the ''water'' (sailing ship, sailboat, raft, Windsurfing, windsurfer, or Kitesurfing, kitesurfer), on ''ice'' (iceboat) or on ''land'' (Land sa ...
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
The 1960 Summer Olympics (), officially known as the Games of the XVII Olympiad () and commonly known as Rome 1960 (), were an international multi-sport event held from 25 August to 11 September 1960 in Rome, Italy. Rome had previously been awar ...
instead.
[''The Brent Magazine'', November 2011, p.27] More than 200 competitors and officials attended, with 5,000 spectators.
The
BBC
The British Broadcasting Corporation (BBC) is a British public service broadcaster headquartered at Broadcasting House in London, England. Originally established in 1922 as the British Broadcasting Company, it evolved into its current sta ...
and
Eurovision televised the event.
The reservoir also hosts the Phoenix Canoe Club and Outdoor centre.
The Phoenix Club provides: Canoeing, Kayaking, Bell Boating, Raft Building,
SUP (Stand-up Paddleboard), Sailing and powerboat to members.
Cycling
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.
[Firth, Malcolm www.abcc.co.uk/Articles/bikeevolve.html retrieved 5 September 2008] For many years Markham had a bicycle shop at nearby 345 Edgware Road.
[
The race was held the day after what is often referred to as the world's first race, in the park at St Cloud west of Paris. It was won by another Englishman, James Moore. His grandson, John, believes Moore is buried near the reservoir.
]
Ice sports
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.
Miscellaneous
Naturists gathered at the Welsh Harp from 1921, until in June 1930 about 250 sunbathers were attacked by 200 objectors. This is referred to as "The Sun-Bathing Riots".
Transport
The Midland Railway
The Midland Railway (MR) was a railway company in the United Kingdom from 1844 in rail transport, 1844. The Midland was one of the largest railway companies in Britain in the early 20th century, and the largest employer in Derby, where it had ...
built its Welsh Harp station in 1870 on its new line from Bedford
Bedford is a market town in Bedfordshire, England. At the 2011 Census, the population was 106,940. Bedford is the county town of Bedfordshire and seat of the Borough of Bedford local government district.
Bedford was founded at a ford (crossin ...
to St.Pancras. The area lost its attraction with the development of West Hendon
West Hendon is a district of Hendon in North London, in the London Borough of Barnet. It is the NW postcode area, NW9 part of Hendon, located around the A5 Edgware Road and the Welsh Harp (Brent Reservoir). The area is known for the West Hendon E ...
between 1895 and 1915 and the station closed in 1903.
War history
The Mechanical Warfare Department, part of the War Office
The War Office has referred to several British government organisations throughout history, all relating to the army. It was a department of the British Government responsible for the administration of the British Army between 1857 and 1964, at ...
based nearby in Cricklewood
Cricklewood is a town in North London, England, in the London Boroughs of Camden, Barnet, and Brent. The Crown pub, now the Clayton Crown Hotel, is a local landmark and lies north-west of Charing Cross.
Cricklewood was a small rural hamlet ...
, used the Welsh Harp for secret tests of a new weapon from 1916: the tank
A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; ...
, especially the amphibious Mark IX tank. Early film of these tests was shown on British
British may refer to:
Peoples, culture, and language
* British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies.
* British national identity, the characteristics of British people and culture ...
television
Television (TV) is a telecommunication medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set rather than the medium of transmission. Television is a mass medium for advertising, ...
in the late 1990s. During the Second World War
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, a seaplane kept on the reservoir was rumoured to be an escape route for the prime minister
A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
. Local residents have recounted swimming to the plane. A DD Mk VII Tetrarch light tank was tested on the reservoir.
Wildlife and nature conservation
During construction, the Welsh Harp attracted uncommon birds. James Edmund Harting and Frederick Bond were regular visitors and shot many birds. Harting documented these in his 1866 book the Birds of Middlesex. They included rare vagrants to the UK such as little bittern, squacco heron and white-rumped sandpiper. This started an interest in the birds of the Welsh Harp that continues until today, giving a unique historical perspective of a site in London. The next prominent ornithologist was William Glegg from the 1920s onwards and he wrote a paper for the London Naturalist in 1930 called 'The Birds of Middlesex since 1866, then a follow-up book to Harting's in 1935, called A History of the Birds of Middlesex.
After the Second World War, a new generation of ornithologists took an interest, such as Professor Warmington, and Eric Simms, who lived just south of the reservoir in Dollis Hill
Dollis Hill is an area in northwest London, which consists of the streets surrounding the Gladstone Park, London, Gladstone Park. It is served by a London Underground station, Dollis Hill tube station, Dollis Hill, on the Jubilee line, providi ...
. They were joined by Dr Leo Batten in the late 1950s. He was one of the movers in setting up the Welsh Harp Conservation Group (WHCG) in 1972 to fight off development. The WHCG has worked to protect the area as a nature reserve, including preventing a golf course and driving range from being built.
The WHCG produces an annual report and in 2000 published a book, Birds of Brent Reservoir, which includes chapters on the social history, the effects of urbanisation and the habitats, as well as a study of the birds and other wildlife. The book's information on birds is regularly updated in an electronic publication, Birds of Brent Reservoir: Facts and Figures. All WHCG publication are available through its website. The WHCG also organises management work, which included an annual refurbishment of the tern rafts until the silting up of this part of the reservoir prevented a safe approach to the rafts, and the group works with Brent and Barnet councils on the management of the site, including applying for National Lottery funding.
The reservoir and much of its shoreline is a Site of Special Scientific Interest
A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...
, 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.
Birds of the reservoir
The reservoir is an important site for breeding waterbirds such as great crested grebe
The great crested grebe (''Podiceps cristatus'') is a member of the grebe family of water birds. The bird is characterised by its distinctive appearance, featuring striking black, orange-brown, and white plumage, and elaborate courtship displa ...
, gadwall
The gadwall (''Mareca strepera'') is a common and widespread dabbling duck in the family Anatidae.
Taxonomy
The gadwall was first described by Carl Linnaeus in his landmark 1758 10th edition of ''Systema Naturae''. DNA studies have shown th ...
, shoveler, common pochard
The common pochard (; ''Aythya ferina''), known simply as pochard in the United Kingdom, is a medium-sized diving duck in the family Anatidae. It is widespread across the Palearctic. It breeds primarily in the steppe regions of Scandinavia and Si ...
, tufted duck
The tufted duck (or tufted pochard) (''Aythya fuligula'') is a small diving duck with a population of nearly one million birds, found in northern Eurasia. They are partially migratory. The scientific name is derived from Ancient Greek , an unide ...
and common tern
The common tern (''Sterna hirundo'') is a seabird in the family Laridae. This bird has a circumpolar distribution, its four subspecies breeding in Temperateness, temperate and subarctic regions of Europe, Asia and North America. It is stron ...
. At one stage, the reservoir was second only to Rutland Water
Rutland Water is a reservoir in Rutland, England, east of Rutland's county town, Oakham. It is filled by pumping from the River Nene and River Welland, and provides water to the East Midlands. By surface area it is the largest reservoir in E ...
for the most breeding pairs of great crested grebe in the UK. Other breeding birds include eight species of warbler
Various Passeriformes (perching birds) are commonly referred to as warblers. They are not necessarily closely related to one another, but share some characteristics, such as being fairly small, vocal, and insectivorous.
Sylvioid warblers
T ...
. In 2008, the first nesting attempt by great cormorant
The great cormorant (''Phalacrocorax carbo''), also known as just cormorant in Britain, as black shag or kawau in New Zealand, formerly also known as the great black cormorant across the Northern Hemisphere, the black cormorant in Australia, and ...
took place as well as the first nesting attempt by grey heron
The grey heron (''Ardea cinerea'') is a long-legged wading bird of the heron family, Ardeidae, native throughout temperate Europe and Asia, and also parts of Africa. It is resident in much of its range, but some populations from the more norther ...
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
The blue-winged teal (''Spatula discors'') is a species of bird in the duck, goose, and swan family Anatidae. One of the smaller members of the dabbling duck group, it occurs in North America, where it breeds from southern Alaska to Nova Scotia, ...
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
The ring-necked duck (''Aythya collaris'') is a diving duck from North America commonly found in freshwater ponds and lakes. The scientific name is derived from Greek , an unidentified seabird mentioned by authors including Hesychius and Arist ...
(2017) and cattle egret
The cattle egret (formerly genus ''Bubulcus'') is a cosmopolitan distribution, cosmopolitan clade of heron (family (biology), family Ardeidae) in the genus ''Ardea (genus), Ardea'' found in the tropics, subtropics, and warm-temperate zones. Ac ...
(2018).
Insects
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.
Mammals
The small list of the mammals is documented in ''The Birds of Brent Reservoir''. The grey squirrel and the red fox
The red fox (''Vulpes vulpes'') is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere including most of North America, Europe and Asia, plus ...
are common; the latter mostly nocturnal. Muntjac
Muntjacs ( ), also known as the barking deer or rib-faced deer, (URL is Google Books) are small deer of the genus ''Muntiacus'' native to South Asia and Southeast Asia. Muntjacs are thought to have begun appearing 15–35 million years ago, ...
have been present since the beginning of the 21st century but are shy, their presence noted mainly by tracks, one or two are occasionally seen in daytime. The reservoir is notable for bats: noctule, Leisler's bat
The lesser noctule, Leisler's bat or the Irish bat (''Nyctalus leisleri''), is a species of Insectivore, insectivorous bat belonging to the vesper bat family, Vespertilionidae. The species was named to honour the naturalist Johann Philipp Achille ...
, serotine, Daubenton's bat and three species of pipistrelle were recorded in one day in September 2007. Regular bat detection evenings in 2008 have shown that Nathusius' pipistrelle is present. Overall 22 species have been recorded, though some have not been recorded recently (e.g. stoat
The stoat (''Mustela erminea''), also known as the Eurasian ermine or ermine, is a species of mustelid native to Eurasia and the northern regions of North America. Because of its wide circumpolar distribution, it is listed as Least Concern on th ...
s were last seen in the 1960s).
Other vertebrates
Four species of reptiles, five species of amphibians, and nine species of fish have been recorded at the reservoir.
Neasden Recreation Ground
Neasden Recreation Ground is a park of on the southern shore of the reservoir. It is mainly grassland with woods, a sports ground and a children's play area. There is access from Aboyne Road and from the North Circular Road, opposite Brook Road and close to Staples Corner.
Welsh Harp Open Space
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,London Borough of Brent, Welsh Harp Open Space
and received a
Green Flag Award
The Green Flag Award is an international accreditation given to publicly accessible parks and open spaces, managed under licence from the Department for Levelling Up, Housing and Communities, a UK Government department, by Keep Britain Tidy, ...
for 2010–11. There is access from Birchen Grove. In the late 19th century, this area was served by the
Welsh Harp railway station
Welsh Harp railway station was built by the Midland Railway
The Midland Railway (MR) was a railway company in the United Kingdom from 1844 in rail transport, 1844. The Midland was one of the largest railway companies in Britain in the ear ...
.
Gallery
File:Brent Res view.JPG, View from the hide towards the dam
File:Silver jubilee park.jpg, Silver Jubilee Park is part of the open space surrounding the reservoir
File:Brent reservoir northern arm.jpg, View of the northern arm of Brent Reservoir
File:Brent reservoir nature reserve.jpg, Brent Reservoir nature reserve north of Cool Oak Lane
File:Sailing boat on Brent Reservoir from Welsh Harp Open Space.jpg, View of sailing boat on Brent Reservoir from Welsh Harp Open Space
File:Welsh harp houses.jpg, Houses by the Welsh Harp
See also
*
Barnet parks and open spaces
*
Brent parks and open spaces
*
Nature reserves in Barnet
*
List of Sites of Special Scientific Interest in Greater London
In England, Site of Special Scientific Interest, Sites of Special Scientific Interest (SSSIs) are designated by Natural England, which is responsible for protecting England's natural environment. Designation as an SSSI gives legal protection to ...
*
List of Local Nature Reserves in Greater London
References
External links
The Welsh Harp Conservation GroupBarnet Council's page on Welsh Harp checked March 2007
Brent Council's page on Welsh Harp Reservoir*
Phoenix Canoe ClubFriends of the Welsh Harp
Further reading
*
{{authority control
Local nature reserves in Greater London
Nature reserves in the London Borough of Barnet
Nature reserves in the London Borough of Brent
London water infrastructure
Parks and open spaces in the London Borough of Barnet
Parks and open spaces in the London Borough of Brent
Sites of Special Scientific Interest in London
Reservoirs in London
RBrent