LMF^^ is right. I did my interview on the 6th.. though it might be useless to say now because all the interviews are over, (I probably should have come here earlier and freaked out as well). But the interview was great. Dr. March was very nice and the students there were very welcoming and polite. "Just treat it like a casual conversation" was the advice given to me by the person going after me. And it was exactly that. So if this thread is still around in late 06, my advice is just like LMF^^ and the person who went after me, just relax and treat it like a casual conversation. Everything that needed to be present was already present. And in terms of dress code, "you are what you were" doesn't necessarily apply. There were some who wore suits in the hot weather, who intimidated us all, and there were some, such as myself, who wore casaul (suitable) clothing. I guess what I'm trying to say is that the interviewer is more interested in what you've got to say and how you present you character, rather than your choice of attire.
Best wishes for everyone who applied to the course! I hope to see you next year. *Fingers crossed I make it over the cut off*