I've found that there are quite a few things you need to get right with the UK gates, and the UI doesn't do a great job of encouraging correct usage. In partic

I've found that there are quite a few things you need to get right with the UK gates, and the UI doesn't do a great job of encouraging correct usage. In particular, I was instinctively looking at the screen instead of the camera, despite the big sign telling you not to.