I applied online, completed game based assessment and then a video interview. Thereafter, I was invited to an assessment centre in London. Assessment centre was mostly group based activities but we also had to write an individual report (1000 words in 40 minutes - although most people didn't manage to write that much, I wrote 700 and still passed). At the very end you give a presentation with your group to a fictional client, who asks you questions afterwards. There is no 1-to-1 interview, only at the end you'll individually sit with the recruiter and share you thoughts about the day, but that is not assessed.