Greenford Birch Wood is one of the smaller green areas northwest of Perivale Park, running alongside the A40 and where most of the drivers there have no idea it exists.
Greenford Birch Wood
(One) source of Coston’s Brook?
Coston’s Brook flowing south
A small pond in the wood
The long …
…and winding…
Path
Chestnut providing colour
Coston’s Brook is a tributary of the River Brent, both running through Perivale Park. The brook itself seems to arise from multiple sources close by to the park. The one in the photos above seems to come from a culvert which drains the nearby Metropolitan industrial estate. It merges with water from the Greenford lagoons, but I am still not certain whether any single source is identified for the brook. Certainly nowadays it runs with much cleaner water.