Very quick 2 step process. Had a video call with the hiring managers and then completed a task which I presented back in a face to face interview to some of the wider team.
Nice offices and very nice and approachable interviewers. Everyone seems to get on really well at the agency, there was a nice vibe in the office when I visited so you got a good indication of what the culture is like there.
Whole process took just over a week from application to offer stage. Super quick and efficient.