Not long passed the assessment day myself.
Physics questions were 15 in total, along the lines of the following, all multi choice:
A hot air balloon rises due to......
A drawing of a beam and asked where to put a weight A to balance the beam which has other weights B and C placed along it.......
Maths questions were fractions and percentages of numbers, also speed distance time etc
Group discussions were, but guess they can pick anything for you:
NHS v's private health care
Environmental Issues and how they'll affect your career as a pilot