After a brief phone interview (10-15 mins), I was invited to a face-to-face interview. This took place at their office in London, and was conducted by a partner and a member of HR staff. They were both very friendly, and really tried to make me feel comfortable. Not intimidating at all. The interview started with a brief presentation (~5 mins), introducing myself, for which they had asked me to prepare for in advance. This was followed by a few personality/compatability based questions, and also a few competency/client-based questions.