Not really an "interview" but they called it an "assessment". Spent a whole day during the record heat in the UK and the assessment criteria were a bit repetitive. I felt like the whole process could have been delivered in a more efficient and less random manner, since most of us were not given any information before the day and during the process. The criteria involved group work and individual tests, and there were staff noting down your performance every move you made. You would work with other candidates.