Wilt

Wilt, released in North America as The Misadventures of Mr. Wilt, is a 1989 film directed by Michael Tuchner and starring Griff Rhys Jones, Mel Smith, Alison Steadman, and Diana Quick. It is an adaptation by LWT of the 1976 novel Wilt by author Tom Sharpe. The story follows the comic misadventures of the eponymous Henry Wilt as he is accused of the murder of his wife when she suddenly goes missing after a party at a friend's house where they have a very public argument.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.