Boreham Airfield, Nr. Chelmsford, Essex, England, UK.

The circuit was in use between 1949 and 1952, where the crowds saw Mike Hawthorn, Stirling Moss and others race around the perimeter road. The site was later used by the Ford Motor Company as a test ground, as well as being home to their rally teams. It was still being used as a test venue by F1 teams in the 1990s before being dug up for a gravel pit. 

The track is very wide so makes for some excellent online racing.