To my shame about 10 years ago I was made to redo my test due to speeding.
I got some lessons and then did my test again. On the test I vented when I was annoyed that I crossed my hands over. To my surprise, the examiner just said it was an 'urban myth" and that it wasn’t a problem. I’m not sure if it’s the same with lgv’s. I ended up getting no minors which I was shocked about - as people talk about bad habits. I think driving is driving. If it’s safe and it works it’s fine. The only thing I really learnt was to slow down - no more points yet so it worked.