Stan Butler (Reg Varney), a bus driver for the Town & District bus company, becomes worried that the overtime he is making – which his family is using to buy expensive items such as a washing machine – will soon end when the company rectifies its current lack of employees. His concerns become justified when the company decides to revoke a long-standing rule that prevents women from being employed as bus drivers, much to the chagrin of both Stan and his long-time colleague and friend, Jack (Bob Grant (actor)). The loss of overtime that he was making forces Stan to persuade his sister Olive (Anna Karen) to get employment in the company's canteen. Following a disastrous start, she and her husband, Arthur, soon discover that she is pregnant, resulting in her losing her job and forcing the Butler family to send back the items they can't afford to pay for. At the same time Stan gets into trouble with the company when, while attempting to recover something of Jack's from a woman he had been seeing, he manages to inadvertently demolish both a telephone kiosk and a bus shelter in trying to avoid being caught by the woman's jealous husband. Despite his efforts to lie about why he caused the damage, Blakey (Stephen Lewis (actor)), the bus company's Inspector, takes delight in informing Stan that he has to undertake a driving test on a bus skid pan in order to keep his job. However Blakey soon regrets supervising the test when Stan gets his own back by beginning the test with Blakey still on the bus being used for it.