Extensive scenes from the film were filmed on the Ashridge Estate, Little Gaddesden, on the Hertfordshire/Buckinghamshire border.[33] Filming of the siege of Castle Chalus took place at the Bourne Wood at Farnham, Surrey during July and August.[34] Filming also took place at Dovedale near Ashbourne, Derbyshire.[35] On July 31, thieves broke into the props building at night and stole cameras that were being used for the film.[36]