1) A^A*9999999887
2) Maths, FM, Physics, CS (A*A*A*A*)
3) #1 in UK for CS, forefront of research, massive depth of topics covered, the city is amazing, love the college system
5) Imperial, Warwick, UCL, Bristol
6) Done Cam, ICL, UCL, Bristol, yet to see Warwick
7) Online videos, lectures, articles on CS in general and a lot on AI, made applications many involving AI/machine learning, programming challenges, maths challenges, Computing/Maths/Physics societies, EDT Headstart Course for CS (summer school), Going to talk about my CS coursework, ...
8) With it being easier than CSAT, I assume (unsubstantiated) that it will be mainly be used to select applicants for interview, and a greater weighting will be put on the interview (especially if the college does a test at interview)