It lasted 45 minutes, with pretty standard questioning. They opened with an unscored question to ease you into the interview, about my motivation. The two interviewers were very friendly. There was a big focus on the financial and budget side of project management experience.

Applied with a cover letter and CV at the end of September. Heard back within a week. Attended interview at London office at the start of October. Interview involved a short (30 minutes) Excel test - finding information from a database, organising information in a particular way etc - which was followed by the interview itself.