Filming started 11 January 1966. The principal filming was carried out at Pinewood Studios, Shepperton Studios and Twickenham Studios in London. Extensive sequences also featured London, notably Trafalgar Square and the exterior of 10 Downing Street. Mereworth Castle in Kent was used as the home of Sir James Bond, which is blown up early in the film. Much of filming for M's Scottish castle was done on location in County Meath, Ireland, with Killeen Castle as the focus. However, the car chase sequences where Bond leaves the castle were shot in the Perthshire village of Killin with further sequences in Berkshire (specifically Old Windsor and Bracknell). Filming had wrapped by October 1966 at which stage Feldman said the budget was between $8.5–9.5 million, of which the cast cost $3 million. Sellers was to receive a percentage of the gross after the takings reached $17.5 million. Five different directors helmed different segments and stunt coordinator Richard Talmadge co-directed the final sequence. Feldman said that Huston contributed 38 minutes in the final cut, Hughes 25 minutes, McGrath 20 minutes, Parrish 20 minutes, and Guest 26 minutes. Huston's sequence involved Sir James Bond meeting the representatives of agencies. It was shot in Ireland and Kent in April 1966. Huston worked on his section of the script with Wolf Mankowitz. Huston had written most of Beat the Devil on location but says "that was discipline compared to this. It was day to day then it's moment to moment here." Huston wanted Robert Morley as M but when he was unavailable, the director decided to play the role himself. Huston says the film "was broached to me as a lark, which it was." McGrath shot for six weeks. Bob Parrish filmed the segment with Andress and Sellers at Shepperton. Hughes was not known for comedies generally but had just directed Drop Dead Darling. Guest wrote and directed the last section and was given the responsibility of splicing the various "chapters" together. Feldman says Parrish was to provide "suspense" while McGrath did "Sellers like comedy". He was offered the unique title of coordinating director but declined, claiming the chaotic plot would not reflect well on him if he were so credited. His extra credit was labelled 'additional sequences' instead. Guest, Hughes, Huston, McGrath, Parrish, and Talmadge received the directorial credits for Casino Royale. Part of the behind-the-scenes drama of production concerned the filming of the segments