Norman Pitkin is the assistant helping to run a small, old fashioned dairy which is threatened by a larger, modern organisation. Pitkin does his best to save the dairy (and his horse) and the usual chaos ensues
Norman Puckle (Norman Wisdom), a well-meaning but clumsy grocer's assistant, can't seem to do anything right. After being rejected by Marlene, the love of his life, he attempts suicide, but can't even do that. He is saved from jumping off a cliff at 'Lover's Leap' by a Royal Navy petty officer. He persuades Puckle to join the Royal Navy, where he'll meet 'lots of girls'. Life in the Navy proves not to be as rosy as it's been described, and Puckle fails at every task during basic training. But despite this, he's regarded by the Admiral in charge of a rocket project to be a 'typical average British sailor', and chosen to be the first man to fly into outer space in an experimental rocket.
Norman Truscott is a store worker who dreams of stardom. Vernon Carew is a singer whose star is fading. Vernon manages to get a recording of Norman singing and passes it off as himself.