It's very worrying that some instructors find it too difficult..
I've been on the phone to the person who taught me to ride, trying to organise to go out with him for a day every few weeks- he's been working 7 days a week for weeks on end. We've seen instructors and learners out at 06:45 on the way to work too, so there must be plenty of interest in taking the bike test. Hopefully this test won't kill it, though it seems to me like it'll be a recession of types. The good years where taking the test is easy enough, then the dark years where the EU takes over and the UK barks when told to, and then hopefully all will be good again after that...