It seems to be a race to the bottom with regards to price
My lessons were £20 per hour about 10 years ago and apparently even that was quite expensive, but today if you took minimum wage from that it'd leave you £8 an hour to run the car, assuming you do 7 hours of lessons in a 9 hr day and the rest is travel you have to run the car on £1,100 a month ... £500 for petrol, probably £400-500 for a high mileage lease (my instructor said he does 50k a year) so £200 to service and maintain it ... my instructor said he got through about 2-3 clutches a year
I know they can expense a lot of it against tax but I can't really see how they make much money at all
My brother in law is an ADI (and not very good one at that IMO) and he makes a very good living.
He charges silly £ per lesson, has a queue as long as your arm, and even with maintenance, insurance, (which includes public and employer liability policies) he does very well.
He teaches people to pass the test and does not feel that drivers need to be taught the skills for life, which given what he charges for a Motorway lesson (a subject he knows absolutely nothing about) makes it all the more embarrassing.
These are the people teaching our youngest and most vulnerable road users and yet they are no better (in some cases worse) than the people they are teaching.
I even saw an instructor the other day tell his student to overtake a queue of traffic and continue through the red light. He did not seem bothered when the camera flashed, but I bet he will be whinging when the NiP and FPN lands on his doorstep