For the UK theatrical release, the BBFC removed a few seconds of the drowning in the aquarium and the sight of a man being bloodily shot in the face in order to obtain an 'A' rating (the equivalent of today's 'PG'). All later releases have been uncut and rated '12'.
In the original UK release Gregory Peck sings "Candy! I Call My Sugar Candy!" while in the US version he sings "Candy! I Keep My Candy Handy!". The US version is obviously dubbed while the UK retains the original line.