Willingale Airport (via RAF Chipping Ongar) - A little known shelved proposal for London's 3rd Airport located between Chipping Ongar and Chelmsford, there were also plans to upgrade the Central Line's Epping to Ongar branch and extend it to the Airport had it been built. - https://www.flightglobal.com/FlightPDFArchive/1979/1979 - 1789.PDF