Choosing the Right Advanced Driving Instructor for Your Needs
By the time you are looking for advanced work, the test is already behind you, and that changes the job. You are not learning to drive any more. You are unlearning the small habits that crept in after the test, and building the ones that were never on the syllabus.
Two kinds of driver come looking for this. The one who passed years ago and has quietly drifted, and the one who passed last month and knows, honestly, that they got away with it. Both are right to come, and neither needs the basics again. What they need is someone who can see the habit they cannot.

What advanced actually means
It does not mean going faster, and it does not mean anything flash. It means reading further up the road, planning earlier, using less brake because you saw it coming, and putting the car exactly where it belongs without having to think about it. Smooth, early, deliberate. The kind of driving that looks dull from the outside and is doing a great deal of work you cannot see.
Questions worth asking before you book
Ask whether they are on the RSA register, first and always. Ask what they actually want to work on, and if the answer is a vague speech about confidence, keep looking. A good one asks you where you drive, what frightens you, and what you think your weak spot is, then names the one you did not mention. That is the tell. A coach diagnoses. A passenger sits there and says grand.
The right instructor names a fault you did not know you had inside the first half hour, and can tell you why it matters, not just that it is wrong. If all you get is nice and encouragement, you are paying for company.
Match the person to the job
Motorway and dual-carriageway nerves need someone who will take you onto one, not talk about it. Night and bad-weather work needs someone who will book the lesson for the actual dark. Coming back after years off, or moving to driving on the left, needs patience and a plan, not a quota. Be specific about what you want, and the right instructor gets specific back.
The same instincts that pick a good school in the first place apply here, so it is worth reading what separates a decent school from a filler one, and remembering that good tuition nearly always costs less than the long way round. And if you are not there yet, if the full-licence test is still ahead of you, start with the structured Essential Driver Training and build from a clean base. First the base, then the polish, in that order. Advanced work is worth far more on top of good habits than on top of bad ones.