Continuity mistake: When gangster no 1 goes to talk to one of his gang at his flat, the man passes out and falls to the floor breaking a rubbish basket. Seconds later he is helped up and the basket is back in one piece again.
Continuity mistake: When the gangsters hold a party a single is put on to dance to. the single is on a blue Decca label. When the single is taken off, it has changed to a black Decca label.
Continuity mistake: When the Young Gangster and Freddie Mays go to see Lennie Taylor, after the guys have beat the man up with the golf clubs, Freddie and Young Gangster get out of the car and start to walk up the street. Young Gangster is walking behind, then moves to walk beside Freddie. When the camera changes to show them from the front, he does it again.