Hello!
I'm going for my stage 1 in London on the 30th March (9.30am). I just read your message, and it made me smile as I am in a pretty similar situation to you. I have no idea what any planes are, and am trying it as I figure that it is worth a go. If I find that I have passed then it's all gravy
, but I'm going to concentrate on one stage at a time.