Every day a band of brave - some might say foolish - instructors set out in dual-control cars to teach people how to drive. Pupils like 69-year-old Mrs Patience Pumphrey. Her record to date: more than 100 lessons and two failed tests. "Trouble is I have good days and bad days", says Mrs P; "and sometimes they are very bad." Somewhere out there are actress Carolyn Allen, screaming whenever things go wrong; Vietnamese boat person Dip Nguyen who, fortunately, has now been persuaded to stop at pedestrian crossings, and instructor Diana Redmond, who smacks pupils when they make mistakes. And watch out - here comes Mrs Pumphrey to take yet another test...