Trainee instructors could ruin chances of passing driving test

As many as 27,000 driving tests have been failed in the last year because the pupil was taught insufficiently by a trainee, according to the AA.

The AA claims that the lower pass rate among trainees' pupils has cost UK learner drivers as much as £1.7m over the last 12 months. The most recent government study showed that learners taught by a trainee are as much as 25 percent more likely to fail their test.