Ben Toney is shown in the radio studio watching The Chantelles perform, and seconds later on the deck of the ship.
Between the police showing Fairclough's identikit picture around London and Fairclough and Benson meeting at Fairclough's flat, the season has changed from winter to summer.
In the penultimate scene there is a car chase around Watford, but in the final scene they suddenly find themselves at (presumably Harwich) docks.
During the dance sequence (filmed at the Rank Ballroom, Watford), there only appear to be about twenty people present. Yet when The Small Faces perform, there seems to be the sound of several hundred teenagers screaming.