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Gunnersbury Triangle

A green oasis created by intersecting railway lines, saved from development and managed for wildlife and people

This wet woodland nature reserve was saved from development in the early 1980s and then enhanced by the creation of ponds and acid grassland areas.

Birds and small mammals take advantage of the sheltered birch and willow while walkways and footpaths help guide visitors around this wild oasis in Chiswick.


New visitor centre

London Wildlife trust has exciting plans for a new and much-needed education and visitor centre at Gunnersbury Triangle, to support the many visitors and school children who enjoy this special wildlife oasis, along with the work of our staff and volunteers. The new centre will be largely created on the site of the neighbouring brownfield site, a former scrapyard. See: New visitor centre for Gunnersbury Triangle


Species you can see at Gunnersbury Triangle

Amphibians: Common toad, smooth newt, common frog

Birds: Green woodpecker, great spotted woodpecker, blackcap, sparrowhawk

Invertebrates: Speckled wood butterfly, orange tip butterfly, ivy bee, stag beetle, azure damselfly

Mammals: Hedgehog, field vole, wood mousepipistrelle batnoctule bat

Plants: Hogweed, broom, ragwortturkeytail bracket fungus


History of Gunnersbury Triangle

Abandoned allotments on railway land which had grown into woodland were at risk of development in 1981. But a campaign led by local people, supported by London Wildlife Trust and the (former) Greater London Council, ensured the area between the railway tracks was protected at a landmark planning inquiry in 1983. The land was given to Hounslow Council, and the Trust invited to manage it as a nature reserve. After work to make it more accessible for visitors, the site opened to the public in 1985. Both Hounslow and Ealing councils, on whose boundary the site sits, later designated the Triangle as a Local Nature Reserve.


Facilities at Gunnersbury Triangle

There is a toilet at the reserve entrance which is open when a staff member is present (usually normal working hours). Seating and interpretation boards are dotted around the reserve’s nature trail.


How to get to Gunnersbury Triangle

The entrance is across the road from Chiswick Park Station (District line). Bus number 440 also stops by the entrance, while services 27, 237, 267, 391 and H91 stop on nearby Chiswick High Road.

Gunnersbury Triangle



Opening times for Gunnersbury Triangle

The reserve is open at all times.


Accessibility at Gunnersbury Triangle

There are gentle sloping footpaths made from natural material, as well as anti-slip decked walkways, but the terrain can be uneven in other places and because there are steep steps wheelchair users will not be able to access all areas of the reserve. There is neighbouring street parking available.


Status of Gunnersbury Triangle

Site of Metropolitan Importance, Local Nature Reserve


Get involved at Gunnersbury Triangle 


Gunnersbury Triangle on social media


Camley Street is on Facebook Find Gunnersbury Triangle on Facebook  


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Nearby nature reserves

Isleworth Ait
3 miles - London Wildlife Trust
Farm Bog
5 miles - London Wildlife Trust
Crane Park Island
6 miles - London Wildlife Trust

Nature reserve map

Reserve information

Bollo Lane
W4 5LN
Map reference
Great for...
Insect spotting
Best time to visit
Apr - Nov
Get directions
Find out here
Public transport
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Opening Times
Open at all times.
2.70 hectares
Guide dogs only
Reserve manager
Netty Ribeaux
Tel: 020 3897 6153