This 35mm screening is part of the Cinematic Jukebox season at the Prince Charles Cinema, You can find the full details here.
Time Out review:
A film noir from the Ealing funny man? But Mackendrick's involvement with cosy British humour was always less innocent than it looked: remember the anti-social wit of The Man in the White Suit, or the cruel cynicism of The Ladykillers? Sweet Smell of Success was the director's American debut, a rat trap of a film in which a vicious NY gossip hustler (Curtis) grovels for his 'Mr Big' (Lancaster), a monster newspaper columnist who is incestuously obsessed with destroying his kid sister's romance... and a figure as evil and memorable as Orson Welles in The Third Man or Mitchum in The Night of the Hunter. The dark streets gleam with the sweat of fear; Elmer Bernstein's limpid jazz score (courtesy of Chico Hamilton) whispers corruption in the Big City. The screen was rarely so dark or cruel.
Here (and above) is the trailer.