The Sibley Hall Lane Oak
This is growing next to a small stream, which skirts along the grounds of Sibley Hall. (approx Girth 4.9m)
Looking at a 1756 map, the stream appears to come from a very large pond on the west side of Elm Lane, flowing through the fields to the Maiden Erlegh Lake. A small part of this stream can still be seen on the latest Ordnance Survey Map. Pity that at one point someone had dumped their household rubbish, and a supermarket trolley!
Thanks to Sheila Crowson for the details and pictures.