[3] Tough gang leader and wannabe rock star Dave Wyman, from the slums of Liverpool, gets called up for National Service.

When his best friend from training is killed by the camp bully, Dave takes revenge, and eventually ends up marrying his singing partner.

"[5] The Monthly Film Bulletin wrote: "These Dangerous Years opens with promise; the Liverpool backgrounds are freshly observed, and the pace is brisk.

"[6] Kine Weekly wrote: "The picture borrows the best ideas, gags and situations from time honoured mixed-up kid melodrama and evergreen squarebashing comedy and vigorously shakes them against authentic backgrounds.

Frankie Vaughan, lucky to escape an army crop, acts naturally, displays a strong sense of humour and sings pleasantly as Dave, Carole Lesley is a charming and talented Dinah and George Baker succeeds, despite the handicap of a few mushy lines, in doing a grand job as the padre.