It was just under two months when I got an offer for an interview, before then I hadn't even had an email acknowledging my application. Hopefully you'll hear from them soon but it might be worth giving them a ring I know some people did, it shows your keen.
Good luck with your interview at East Anglia, I'm sure you'll be fine. The one I had an Oxford Brookes went quite well I thought, it was a group interview. We all sat in a circle; including one lecturer and one occupational therapist and started by introducing ourselves and explaining where our names come from. Them we were given a list of things such as free healthcare and provision of social activities and had to choose the five that we would feel would be most important to us as we aged. The lecturer and the occupational therapist watched whilst we discussed this and then when we had agreed on a top five we fed back to them and explained why we had chosen them. After that the lecturer just asked what experience we had, how we defined occupational therapy to other people and also what skills we felt you had to have as an occupational therapist and why. Although it was a group interview it was quite relaxed and the lecturer made sure that everyone had the chance to talk. I'd been so nervous about going yet when I was in the interview I wasn't nervous at all.
After the group interview we had a written task. In this task we had to watch a video about a girl with epilepsy that was roughly ten minutes long. Then we had to answer two questions about the video which I think were something like; how do you think she is feeling and what makes you think she is feeling this way? It wasn't too bad, most people wrote about two sides of a4 and we all talked about things such as body language and tone of voice as well as what the girl was actually saying.
Sorry, I didn't realise quite how much I was writing here, it's getting a bit like an essay! Overall I found the interview OK and I went home feeling quite confident about it; the worries kick in when it gets to a few weeks after and you haven't heard anything back. That's when you start to analyse every little thing you said and make yourself nervous.
Anyway good luck with the interview and I hope you hear from Brookes soon. Is East Anglia your first interview? Also do you have a uni which would be your first choice?
Good luck with all your unis! Let me know how you get on