It is annoying!
I learned to drive (a manual) in the Colorado mountains and I have never used the handbrake to go up a hill! During my last lesson I stopped on a hill, then moved off, after which my instructor told me that I should have used my handbrake. I asked why, to which he replied that it would prevent me from rolling back. I said, oh, "did I roll back?". He said, no, you didn't, but you should still use it. I was like, WTF???
Doesn't the fact that I can use clutch control to get up a hill show better driving than using tricks to prevent your car rolling back? Apparently not in Britain!
I had never even heard of this handbrake trick before. I asked my husband about it (he's also American and learned to drive in the mountains), he said that his US driving instructor had mentioned it, but said " you are learning to drive in the mountains, so instead of using tricks learn how to use your clutch".
Now I have to go out and practice doing yet another driving thing that is completely unnecessary! Grrrrrr....
Mainly just venting here! This Uk driving test business sucks!