Spot on advice from Huckster.
My good lady is a driving instructor and is really enjoying it despite the tribulations involved in getting qualified. These big schools charge the earth and give no support whatsoever. They will send you a room full of text books but no explanation of what to do. Remember that these people are after everyone's cash and not after improving the nation's driving.
We were stung by 2 different companies before we realised that it would be best to learn under a professional, independant, reliable instructor...