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The River Ingrebourne is a tributary of the River Thames 27 miles (43.3 km) in length. It is considered a strategic waterway in London, forming part of the
Blue Ribbon Network The Blue Ribbon Network is a policy element of the London Plan relating to the waterways of London, England. Aside from the River Thames, the major components of the network are: #Grand Union Canal #Regent's Canal #River Lee Navigation #River Br ...
. It flows through the London Borough of Havering roughly from north to south, joining the Thames at Rainham.


Etymology

The name is recorded in 1062 as ''Ingceburne'' and its suffix is a form of the Old English 'burna', meaning
bourne Bourne may refer to: Places UK * Bourne, Lincolnshire, a town ** Bourne Abbey ** Bourne railway station * Bourne (electoral division), West Sussex * Bourne SSSI, Avon, a Site of Special Scientific Interest near Burrington, North Somerset * Bourne ...
, a type of stream. The meaning of the prefix is unclear, although it could refer to a person.


Description

It rises near
Brentwood, Essex Brentwood is a town in the Borough of Brentwood, in the county of Essex in the East of England. It is in the London commuter belt, situated 20 miles (30 km) east-north-east of Charing Cross and close by the M25 motorway. In 2017, the popula ...
, whence it flows in a southwesterly direction under the
M25 motorway The M25 or London Orbital Motorway is a major road encircling most of Greater London. The motorway is one of the most important roads in the UK and one of the busiest. Margaret Thatcher opened the final section in 1986, making the M25 the lon ...
through the London Borough of Havering in north east London. The river passes under the motorway near Junction 28, where the first of its tributaries, the 2.7 miles (4.3 km) long
Weald Brook Weald Brook is a water course in the parliamentary constituency of Hornchurch and Upminster. Weald Brook flows into the River Ingrebourne The River Ingrebourne is a tributary of the River Thames 27 miles (43.3 km) in length. It is consi ...
joins, followed shortly by Carters Brook and Paynes Brook. After skirting south of the built-up area of Harold Hill the route is partly non-urban: a large area of flood-plain follows before the Ingrebourne threads between the suburbs of Upminster and Hornchurch. The river from here is surrounded by public open space: with Gaynes Parkway, the Ingrebourne Valley Greenway and
Hornchurch Country Park Hornchurch Country Park is a 104.5-hectare park on the former site of Hornchurch Airfield, south of Hornchurch in the London Borough of Havering, east London. Site The River Ingrebourne passes through the park and if forms part of Thames Ch ...
taking up the area until reaching Rainham. Here the river divides, the main channel becoming Rainham Creek, where it flows into the Thames between
Hornchurch Marshes Hornchurch Marshes is an area of the London Borough of Havering, adjacent to the north bank of the River Thames in London, England. Susceptible to flooding from three adjacent rivers, it was the southernmost marshland section of the ancient paris ...
(to the west) and Rainham Marshes (to the east) at Old Man's Head. The second channel becomes the Wennington Sewers complex.


Significance

The Ingrebourne Marshes are 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 of ...
because of the diversity of its wildlife and extensive areas of wetland reeds. The river forms one of the strategic waterways identified in the
Blue Ribbon Network The Blue Ribbon Network is a policy element of the London Plan relating to the waterways of London, England. Aside from the River Thames, the major components of the network are: #Grand Union Canal #Regent's Canal #River Lee Navigation #River Br ...
policy in the London Plan. The Ingrebourne Valley is a Local Nature Reserve.


See also

* Tributaries of the River Thames * List of rivers in England


References

{{DEFAULTSORT:Ingrebourne Rivers of London Geography of the London Borough of Havering Parks and open spaces in the London Borough of Havering 1Ingrebourne