There is a reason why you didn’t pass last time. I suggest you go for an assessment or two, taking your test report with you, and get an honest appraisal of what you need.
The prospect of another full course should be highly unlikely, provided you were trained correctly to start with.
No decent trainer will provide a vehicle for you just to take a test. So, if it’s offered, you know you’re in poor hands before you start.
Pete 