He subsequently appeared in character roles in many films, including Captain Clegg, The Wild Geese, The Sea Wolves, Puppet on a Chain, and Who Dares Wins.

[citation needed] In 1967, Allen and his wife Sarah Lawson appeared together playing a married couple in the science fiction film, Night of the Big Heat.

[8] Allen narrated the British Government's Protect and Survive series of public information films in the 1970s; some of his lines in that production were re-recorded and sampled into the single "Two Tribes" by the band Frankie Goes to Hollywood.

He also appeared in and voiced numerous commercials for house builder Barratt Homes and car manufacturers Ford and British Leyland among many others.

Allen's voice was heard at the beginning of videocassettes distributed in the UK by Video Network in the 1980s, welcoming viewers and reading an anti-copying warning.