Royal Air Force Hornchurch, or more simply RAF Hornchurch, is a former Royal Air Force sector station in the parish of Hornchurch, Essex, located to the southeast of Romford. The airfield was known as Sutton's Farm during the First World War, when it occupied 90 acres (360,000 m2) of the farm of the same name. It was used for the protection of London, being 14 miles (22.5 km) east north-east of Charing Cross.