I've seen a few threads on here in the past from frustrated parents of teenagers trying to book practical driving tests. The DVSA have come up with proposals to make it easier and are asking the public for their views. I was notified because I booked my DD's theory test for her.
What's shocking (to me) is how much of this problem is down to fucking dodgy driving instructors.
Improving car driving test booking rules
Sorry if this is in the wrong place MNHQ.