Initial game style interview, then a virtual more technical interview with two interviewers which comprised 15min of you presenting something and then 30/40 min of them asking you about it. If successful on that stage then invited to a 2 night assessment centre.

laid back 2 interviewers research focused personality based questions star method questions - The interviewers were not intimidating. They had genuine curiosity and were intentional with follow up questions. We talked majority about my research.