moon3012:
My understanding is that they don't use their own driving instructor schools. They use the main school provider in your area.
The fees I think are in the region of £3000 to £3500 depending on how long it takes.
Be careful to look into this career option properly. I understand that first year earnings can only average £14k. You are also often self employed and have to do your own tax returns. It can take quite a few years to become established and to get word of mouth recommendations, so you can earn a decent amount. The £30k earnings advertised are optimistic and require you to work alot of hours, probably over 7 days. So the adverts about setting your own hours may not be totally realistic.
I know of several people that have chosen this career. A couple of them really enjoy it, as it easily beats working in an office with all the targets and jumping through hoops required these days. But you have to flexible and accept that your earning to begin with, will not be what you expected. Another person I know, gave up after a couple of years, as the income was not enough for them to maintain paying all their bills. I suppose it depends on where you live and what the competition is like.
Huckster