I didn't have a lesson before the test but the friendly examiner took time to explain what was going to happen and the format of the test before we did the necessary. No pressure and having passed my skills test a couple of days before I was convinced I now possessed super powers
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Make sure you know how to do a mayday and pan call and how to cancel them. You'll probably also get a MATZ penetration but there's nothing that isn't covered in CAP 413 so if you're happy with that you'll have no problems.
Good luck.