| Director | Harry Booth |
|---|---|
| Budget | £90,000 |
| Box office | £2.5 million |
Stan Butler, 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. The loss of overtime that he was making forces Stan to persuade his sister Olive 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 cannot afford to pay for. At the same time, Stan gets into trouble with the company while attempting to recover something of Jack's from a woman he had been seeing, when 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, 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.
Stan manages to pass the test, but he soon becomes worried that the employment of women drivers will affect both his and Jack's layabout lifestyle at the company. It would also reduce their pay and prevent Jack from conducting amorous flings with women on the company's time. The pair decide that the best way to prevent this from happening is to sabotage the company's new employment scheme by making the women drivers look bad, and initially pull off small pranks. Later, when Stan witnesses Olive being terrified of a spider, he and Jack gather some to plant in the cabs of the women's buses, causing further disruption with their driving. These, however, have little effect, until Stan comes up with the idea of lacing their tea with a diuretic, upon learning of what it does when Olive acquires some for her pregnancy. This results in the women drivers being forced to make frequent toilet stops whilst on their routes resulting in multiple delays.
As Olive's pregnancy draws closer to term, Arthur requests Stan's help in fixing the springs on his motorcycle's sidecar to prepare it for the trip to the hospital. While bringing the springs into the depot to get them fixed, amongst a few small things for the new baby, he and Jack discover that the company recently ordered a number of diversion signs to be made to divert buses away from roadworks in the town. Deciding to take advantage of this, the pair arrange for more to be made for their own use, then planting them out on the women's routes; thus causing even more trouble. One such false diversion causes a woman driver to get forced onto a motorway, causing her and Blakey, who was on board, to get in trouble with the police.
A mishap occurs in getting her to the hospital when the bike and sidecar breaks in half, but Olive manages to reach the hospital and give birth to a baby son, but the joyful arrival soon brings disruptions to the Butler household as they struggle to cope with the new child. Meanwhile, Stan and Jack are delighted to learn their sabotage efforts were a success when the company announces its decision to no longer employ women bus drivers. Their celebration is short-lived, however, when they learn that Blakey re-hired the women drivers they tormented as inspectors, and they promptly separate the two onto different routes.
Although the pair are not happy about this and intend to quit their jobs, Stan soon sees a silver lining to their situation when he is twinned with Sandra, a new attractive female clippie for his route. The story ends with Stan and Sandra managing to cause trouble to Blakey by knocking down a sign onto him and the other inspectors, much to Stan's delight as he heads off to do his route.