I’m an old person and I thought I’d seen a fair bit of the best and worse of people but have learned such a lot more about people since I’ve been visiting Mumsnet.
Some of the comments on this thread really do take the biscuit. As a previous poster said this is a classic, not for the original question but for the sheer irrationality of some of the posts/posters.
If something is illegal, it’s illegal, it’s illegal for a purpose. We’re not talking about a pinch of weed or not paying your vehicle tax; this is potentially life threatening to the learner, the instructor and any other poor person who might get in the way of an out or control car. Posters have explained that some forms of epilepsy could cause the driver’s hands to lock on the steering wheel (= instructor can’t steer), thrash their arms around (= potentially knocking instructor out). We don’t even know if the learner is learning on a dual control vehicle; not everyone does.
The learner has lied to the DVLA to get a provisional license; heaven alone knows where that leaves the instructor and his insurance.
Apart from the fact that this is illegal some posters seem to think it’s OK. They are talking out of the backs of their necks or, actually, two foot further south. How would they feel if they were in OP’s position and discovered her friend’s son had had a seizure and killed themselves, the instructor and the queue of people at a bus stop ?
I really am appalled. Good on you OP for being pro-active. I hope you manage this without losing her as a friend but if she was my friend I would be viewing her in a very different light now.