or Roxbourne Brook which drains central (station areas) of Rayners Lane and West Harrow. About (or in flow) southwest is the East Arm, which drains all of South Harrow and surface from Brook Retail Park. The west arm thus sweeps the Brook's main curve, from which many tiny meanders have been lost through North Harrow, the west of Rayners Lane i.e. east Ruislip boundary, then the South Ruislip-Ickenham boundary (skirting RAF Northolt (former Hill Farm, Ickenham and Hundred Acres Farm, Ruislip) by an abrupt direction change from south-west to eastwards). Failing to drain to the site's south-east corner it is fed by the East Arm having passed there. The brook then settles on a south course. It bisects Yeading then forms the long Southall-Hayes boundary exactly, traditionally. In its final reach it is directly west of the generally naturally elevated A312 "The Parkway" and of a notable point of a canal, the network of which is unlinked, due to overshoot by a canal aqueduct. This is Bull's Bridge (canal) junction of the Grand Union Canal and its Paddington Arm. The river becomes the Crane at the bridge of North Hyde Road, which marks the straight northern boundary of the dominant manor and former medieval parish (and still of the Church of England ecclesiastical parish) of Cranford. Amenity to residents and visitors It is long and walkable along most of its length. It passes through or skirts eight green spaces, a mixture of parks, nature reserves and small open spaces. These comprise Yeading Brook open space, North Harrow, Roxbourne Park, Ruislip Gardens open space, Ickenham Marsh (where it joins the Hillingdon Trail), Gutteridge Wood and Meadows, Ten Acre Wood, Yeading Brook Meadows, where it augments the Grand Union canal walk and Minet Country Park, which has two very minor tributaries and their sources. Added tributary The Ickenham Stream lightly feeds the Yeading Brook directly upstream of the A40 Western Avenue. This was dug and lined in the early 19th Century to convey water from a Grand Junction Canal-feeder reservoir which in the 1930s became Ruislip Lido. References External links Crane Valley Partnership Yeading Brook 1Yeading