Note Morfe House at the bottom of the map!

Anyway .... Green Lane, Water Lane and Forest Lane running leftish to right across new runway are part of an ancient trackway (I believe) that lead to the Roman Road beyond highgate common. This probably was no more than a drove to the fort though, but habitation could have sprouted along it. Long shot or what!

What you really need is a very dry spell and a flyover to do some crop mark spotting. I wonder if one of the nice people at Halfpenny Green (International Elect) Airport would take you up :-)