The Informers (1963 film)

The Informers US title Underworld Informers is a 1963 British crime film produced and distributed in the UK by The Rank Organisation and distributed in the USA by Continental Film Distributors. It was directed by Ken Annakin, produced by William MacQuitty with the screenplay by Paul Durst and Alun Falconer from the novel Death of a Snout by Douglas Warner. It starred Nigel Patrick, Margaret Whiting, Harry Andrews, Derren Nesbitt and Colin Blakely. Cinematography was by Reginald H. Wyer.

Source: Wikipedia