Frank Windsor (born Frank W. Higgins; 12 July 1927) is a British actor, mainly on television.
Windsor attended Queen Mary's Grammar School, Walsall, and studied speech training and drama at the Central School of Speech and Drama, then based at the Royal Albert Hall, London. He played Detective Sergeant John Watt in Z-Cars from 1962 to 1965, and thereafter its spin-offs Softly, Softly and Softly, Softly: Taskforce from 1966 to 1976. He appeared as 'Tobin' in Series 6, Episode 9 of The Avengers. From 1987 to 1989 he starred in the comedy drama Flying Lady written by Brian Finch. He starred as a rather old-fashioned headmaster grappling with problems in education in Headmaster, which started as a single play in Play for Today in 1974 and was well received, being expanded into a six-part series in 1977. In 1969 he appeared in the pilot episode of Randall and Hopkirk (Deceased) in the episode "My Late Lamented Friend and Partner" as Sorrensen, a wealthy businessman with a murderous streak. His lighter side was demonstrated in the pilot episode of the situation comedy The Dustbinmen in 1968, and as Scoutfinder General in an episode of The Goodies.
He had regular roles in the BBC drama Casualty; the ITV drama Peak Practice; he played Major Charlie Grace in EastEnders (1992); appeared twice in Doctor Who; had various stage roles, and in his later years appeared in a number of television commercials advertising life-assurance policies for people over-50. He was the subject of This Is Your Life on 3 December 1975 when he was surprised by Eamonn Andrews at the Metropolitan Police Sports Club in East Molesey.