The official link for booking your theory test:

To book your theory test, you will need to provide your driving license number. You will also need a debit or credit card. The theory test currently costs £23.

The official link for booking your practical driving test:

To book your driving test, you will need your theory test certificate number, the date you passed your theory test, your driving license details, and a debit or credit card. The test will cost you £62 on weekdays, and £75 for a weekend slot. You will be asked to provide my “ADI number”. This should just be left blank.

Everything you need to know about the Pass Plus Scheme:

If you’ve passed your driving test in the last 12 months, you may be able to get a substantial reduction on your first year’s insurance by doing the pass plus course, and at the same time, you can increase your skills and confidence. Paul is a pass-plus registered instructor. We charge £150 for the complete course. This price includes lunch if you choose the one day pass plus adventure drive.