Royal Air Force Station Boreham or more simply RAF Boreham is a former Royal Air Force station in Essex, England. The airfield is located approximately 4 miles (6.4 km) north-northeast of Chelmsford; about 30 miles (48 km) northeast of London Opened in 1944, it was used by the United States Army Air Forces. During the war it was used primarily as bomber and a troop transport airfield for paratroopers. After the war it was closed in late 1945. Today the remains of the airfield are partially used as a gravel quarry as well as the Essex Police Helicopter Unit.