Had a couple of private messages asking what questions are being asked at Stage 1.
As bobit says above, it would be really unfair to do this so I'm afraid I can't be very specific but Learn the literature NATS sent you (all of it!) I spent weeks reading and making notes over and over again and it paid off as I could see the correct answer right in front of me. I know for a fact I got a couple of questions not based on the literature wrong and maths was never my strong point, so getting through the morning session was, for me, down to solid knowledge of the NATS document.
My only advice on the afternoon session would be from reading through this thread is that answering all the questions is possible, I didn't quite manage it but perhaps the people that can and accurately are the people NATS want.