Further Up the Creek

Further Up the Creek is a 1958 British comedy film written and directed by Val Guest and starring David Tomlinson, Frankie Howerd, Shirley Eaton, Thora Hird, Desmond Llewelyn and Lionel Jeffries. It served as a follow up to Up the Creek, with Sellers not reprising his role because it clashed with the filming of The Mouse That Roared. Frankie Howerd was drafted in to replace him.

Source: Wikipedia