Are formal lessons mandatory? Or can my husband just help me brush up on the differences from driving back home?
I doubt he’ll be able to. In my experience, the UK test is all about showing that you can do certain things in exactly the way they want you to do, like backing around a corner. When I took my test, it was crucial that I be able to start with the car at the curb on one road and then very carefully and slowly back around a corner until my car was on another road. I was trained to do this as part of my lessons and dutifully showed I could do it during the test. I have never done it since and couldn’t possibly teach you how to do it as I can’t remember all the obscure rules. The test is full of that kind of thing.
Incidentally, while everyone in this country is pretty good at backing around a corner, none of them have the slightest clue about driving on the motorway. That whole subject is completely ignored.
I had two lessons and lots of practice backing around corners and parallel parking and passed first try .