CV and cover letter, then online tests. First round interview day in London: two 45 minute interviews. First was CV-based, with two ACs, and some market sizing questions. Second was very numerical, dozens of mental maths questions off-the-cuff, and business evaluation. I read Case in Point which was vaguely helpful, but the questions didn't fit any framework - they've read it too and deliberately make up questions you can't memorise answers for. Read Case in Point anyway, because there are some concepts they asked me about (e.g. define value for a business) that you'd need the business experience for. The guys in the first interview was nice, but I fell apart in the second one with two post-MBA interviewers. They weren't unpleasant, but they constantly push you for answers and the standard they expect is extremely high. Lots of people applying for AC were postgraduates or had some experience in interview - your average 21 year old would really struggle in that interview. Of course, they're not looking for average, they're looking for really bright and analytical prepared people who can go and advise company directors.