Filming took place in London, Manchester, Buckinghamshire, Devon, Hertfordshire and South Wales. Although scenes were filmed outside the Houses of Parliament, the inner courts, interior hallways and staircase were represented by Manchester Town Hall, which is built in the same Gothic Revival style as the Palace of Westminster. The offices of Thorpe and other MPs were created at Bulstrode Park, a vacant country house in Buckinghamshire. The grounds of Bulstrode were also used for the night time assassination attempt scene set on Exmoor.