I have received interviews for UCL and Roehampton for PGCE (Primary)

I have received interview dates to the following unis for PGCE's but as an Irish applicant I'm scared to what they will ask. Is there any certain key terms and theories I should research before hand? Could any one please advise me on this as I really want to succeed and start the course in September. Any information at all will be greatly appreciated.

They might ask you how much you know about the English system. Is this for Primary or Secondary?

It is for Primary. I'm scared there's certain theories and terms I'll need to know. I seen a forum before where people were talking about things like SEN and MFL. I'm not really sure how I can prepare if i don't know much about these terms and I'm kinda lost why they were asked to talk about them.