Applied online, had a successful telephone interview and was invited for "final interviews" at the London office. I was told that I would have at least two back-to-back competency based interviews and if I was successful in those then I would have an interview with a VP. The back-to-back interviews were very different in style. The first interview being technical and motivational questions, giving examples of working with data etc, overall hard questions. The second interview was much more relaxed and more conversational, asking about my CV and experience so far. After both of these I was told to wait in London and received a call inviting me to a final interview with as VP later that day. I arrived on time and was seated at the internal audit department where I waited for over 30 minutes to be seen! When I was eventually called I had a surprise interview with a member of the department which was very tough consisting of all technical questions. Interviewer was not friendly and gave limited feedback on my ideas. Finally, I was able to see the VP who was very friendly and interview was relaxed. Mostly asked questions about me, my CV, motivation, but also tougher scenario questions. Overall a good experience. Perhaps the waiting and very tough surprise interview before main VP interview was intentional to see how you cope under pressure, in fast-paced environment etc. Also did not expect 4 interviews in the same day.