The DSA states that on average it takes about 45 hours with a driving instructor and 20 hours of private practice in order to pass your driving test. However since each person is different I simply promise that I will help you pass in as few hours as is possible to make you a safe driver...
If you do practice with family, remember that you can be fined up to £1,000 and get 3 to 6 penalty points on your provisional license if you drive without the right supervision...
Home page for drivebye website which introduces the driving instructor