<Li> Michael Knowles as Staff Captain </Li> <Li> Fred Griffiths as Bert King </Li> <P> Filming took place between 10 August and 25 September 1970, at Shepperton Studios and various locations, notably Chalfont St Giles . </P> <P> The film made a number of significant changes, imposed by Columbia Pictures, such as recasting Liz Fraser as Mavis Pike instead of Janet Davies and filming outdoor scenes in Chalfont St Giles rather than Thetford . Also, the bank was now "Martins" rather than "Swallow" Bank, and, with the increase in budget, the set interiors and the vehicles used were completely different, and the streets of Walmington had extras walking on them . The audience saw the Germans preparing across the Channel, rather than them simply being an unseen threat, and the events of the platoon's formation were revised in various ways for the big screen treatment . </P>

Where was the original dad's army movie filmed
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