Applied from career website in March. Initial phone interview after 2/3 weeks, classic screening about your profile (CV) and the application (motivation), very polite interviewer and nothing to worry about. This is the perfect time for asking about the role and some clues because the later case study will focus on the office tasks. 1 month later received feedback and invited to interview in London. Interview divided into 2 part: 1-Competency based interview with manager; 2-ppt presentation of the "case study" with partner. For the case study, topic received 4 days before the interview, so be fast. For the case study: focus on the office/line (Risk Advisory/ Audit...) more tailored better it is. People were very professional and interview carried out in a "calm" and relaxed way, I was very surprised, thus be yourself and do your homework.
Best of luck.