RAF Cardington, home of the Ill fated R101, which remains to this day the largest British aircraft that has ever been constructed, at 777ft long, is a record that has never been broken. Also Cardington was where the barrage balloon crews were trained in World War II. Cardington became one of the major British sites involved in the development of airships when Short Brothers bought land there to build airships for the Admiralty. They constructed 2 airship sheds in 1915 to enable them to build two rigid airships, the R-311 and the R-32. The airships site was nationalised in April 1919, becoming known as the Royal Airship Works.The two airship sheds ceased being part of the RAF Cardington site in the late 1940s and they were put to other uses.In 1993 planning permission was granted for construction of theatrical stagings and the site was used for rehearsals by musicians including Paul McCartney Band on the Run, U2, Rod Stewart, Take That and AC/DC. Shed 2 has been leased to Warner Bros. and is used as a studio for film and television productions, such as Batman Begins, The Dark Knight, and Inception .