TQ 55 94.
The London/Havering/Essex boundary goes down the Weald Brook. On later maps this has changed to going down the M25.
The Weald Brook flows south and east towards the River Ingrebourne and the Thames
Post to the west Noak Hill
Post to the east South Weald
Sites on the London,Havering, side of the border
The Osiers. Ancient woodland in private ownership
Burnt Wood. Ancient woodland in private ownership
This crosses under the motorway four times and is the main source branch of the River Ingrebourne. The high, steep banks are dominated by shrubs and trees with bramble, hawthorn, young sycamore and alder and there is little channel vegetation. Deer use it and there are water voles.