I first had a video interview and then was invited to an interview in the office. The video interview lasted 30 minutes, the one in the office 3h and 30 minutes and involved 2 tests. I was not fully explained how the long interview happens so I missed some opportunities to ask questions - I never saw these interviews later in the process.

they sent me an email with a link to decide a day and time for the interview. The interview was with one person only. It was a half an hour online interview. The position they were offering was a remote/online position from anywhere in the UK