Easy, invited for assessment centre straight away as first and only round. AC was a whole day, speed interviews, group tests, and presentations throughout the day. Best thing to do is just work well with the others and make friends quickly so you have a good groupp
Asked to create a power point, perform usual "tests" such as maths skills, programming, etc
Also had 1:1 with members of staff, quite casual. Talked about likes, interests, hobbies.
Overall quite a good experience, very pleasant and friendly