http://maps.google.co.uk/maps?f=q&hl...3,0.019162&t=k
Looks like an airfield to me. Also referred to as Upminster
Found these road directions:
UPMINSTER-DAMYNS HALL FARM
Head in to Aveley on B1335 and head north on Aveley road signed to Upminster. A few hundred yards after a crossroads (Warwick Road and Bramble Lane) you will see a couple of houses on the left. There is an RVP sign – turn here for the strip. Down the side is a small road with a barrier, which is often closed but there is room to walk past. The strip is beyond the gate. Don’t forget the far set of hangars, hidden behind hedge near the runway. They aren’t easily visible from the first ones as they are hidden by a dip.
Source:
http://www.geocities.com/krayzeekris/essex.htm
Aerial view
http://www.microlightsport.co.uk/Contact/contact.htm