Called by recruiter. Had a skype pre-screen interview and then was called to have an interview in their London offices. I had a 1:1 interview with their CTO which was quite nice. Then passed along to the rest of the team where each one of them described what they do and asked me questions related to their role. Overall quite pleasant folks apart from a sysadmin where he expected to describe 2-3 things and offer him a solution on a piece of paper on a very hands on issue and also he expected to hear the solution he had thought for this issue.