My lesson prices:
£25 for a single 1hr.
£48 for a 2 hr lesson.
Block bookings of 10 hrs = £225.

The DSA's recommendation for the number of hours taken to get to test for the average 17 year old is about 40 hours.
Needless to say the older you get the longer, on average, you may take to get to test standard.
Like all averages half the population will be above that figure and half will be below.
Whether you will take less or more lessons depends on 2 things;
Your natural ability.
Your willingness to learn.
Natural ability is not something you can change. However you willingness to learn is all down to you.
Lessons will be conducted at your own pace. If you want to learn quickly the lessons can be at a faster pace.
Using the training manual that I supply you can help to speed up the time taken to get to test.