Royal Air Force Charterhall or more simply RAF Charterhall is a former Royal Air Force satellite station located in the Scottish Borders and the historic county of Berwickshire between the village of Greenlaw and Duns. It was originally a First World War landing ground named Eccles Toft. The airfield was reconstructed in 1942 and was used mainly by No. 54 Operational Training Unit during Second World War. The RAF left in 1947 and the airfield was officially closed. The location was then left for agricultural use before becoming a motor racing track in 1952. Various forms of motorsport took place at Charterhall, including Formula Two, Formula Libre and Formula Junior with drivers such as Jim Clark, Sir Jackie Stewart and Sir Stirling Moss all having competed there until motor racing ceased at the airfield in 1964.