I think this programme is stupid. These people have just passed their test or have not driven for months since their test. They are bound to make mistakes- everyone does. Then judging their driving by a traffic officer (with a huge gap in her teeth) isn't necessary- they know they've made the mistakes so why do they need to be told again? And giving them advanced driving lessons isn't necessary either, they need to get experience not lessons...
I'm sure if you filmed the same programme but with old age pensioner drivers, you'd get the same sort of mistakes made. Paints a bad picture of us new drivers, taking advantage of the small mistakes we make.