I had a group interview and it was quite short and mainly focused on scenario type questions. It was only a small group of people, maybe about 6 of us. Basically, speak up but don't try to overly dominate the discussion, but also to make sure to get all your points out because firstly, if you don't then someone else will, and secondly, they can only judge you on what you have said.

It was a group activity interview where they assess how well you work and discuss ideas with others. The only challenge was that most people had the same points to make, so it could be hard to stand out. I took part and contributed to the discussion, but it felt like they were looking for people who spoke more and were more noticeable in the group.