The day was principally a tour of the building and the facilities - the interview itself was 15 minutes long and was 5 competency-based questions. The glassdoor reviews for the previous recruitment cycle were very different, so no guarantees it'll be the same next time round. Make sure you prepare competency answers, though.

You were asked to complete a video interview of four questions, two of which are given to you before the interview. The two prepared questions are allowed 90 seconds to answer, the two unprepared 60. This definitely requires a great deal of preparation, especially as you have very little time to think of your answers and cannot re-record them.