Maths Pool Interview at Girton

OK, I've got an interview at Girton this week but have no idea what it's going to be like. The woman on the phone just told me to get there I would have two interviews. I looked on their site and everything about the format and it says that there is normally a 1 hour paper and the questions are discussed in the interview (this was just for normal interviews though, not pool ones). Do people know whether the pool interviews are just basically a repeat of the December ones or are they different? I really just want to know what to expect, doubt it's really going to make any difference, lol.