The body double was only used for the rear shots, the rest of it is Ms Ekland in her glory. The singing voice is Sheila Mackie, who also sang The Highland Widow's Lament which opens the film; not sure who the speaking voice is though, terrible accent and all. And talking of terrible accents, The Landlord himself, Alder McGregor, is played by none other than Lindsay Kemp, mime teacher to both David Bowie and Kate Bush.