A quick offset multi close to Manor Road in Woodford Bridge.
The co-ordinates take you to a Postbox on the East side of the Green outside a popular Pub. The post box has a number on it starting with IG followed by three digits (lets call them A, B and C).
The final cache can be found at:
N 51° 36.(A/2)(A/A)(B/2)' E 000° 03.BBC'