I went through an online interview where I had to record myself and answer questions as they appeared on screen. Then a telephone interview with the recruiter. The recruiter was brilliant (Gareth), would call up to check up on the candidates.
The assessment day was split into three activities, group based task (no right or wrong), skills task, and interview.
Everything was great, the skills task was simple enough, and the interview was really good. The people there are really friendly and not all cold or rude unlike other recruitment interviews I've been to. I fell short on the group activity, I was quite and I didn't speak as much.