Earls Colne Airfield (ICAO: EGSR) is a former Royal Air Force station in Essex, England. Earls Colne has a CAA Ordinary Use Aerodrome Licence (Number P860), issued to Bulldog Aviation Limited. The airfield is located 3 nautical miles (5.6 km; 3.5 mi) southeast of Halstead, approximately 5 mi (8.0 km) east-northeast of Braintree; about 45 mi (72 km) northeast of London Much of the airfield today is being used as a golf course. A flying club also operates from the old airfield. It is the home of the Essex Air Ambulance.