I have recent experience of a Pembroke interview for ChemEng. Obviously I can't guarantee this year will be the same format but if you get an interview (which will probably take place on or around Dec 5th) come back on the site and I will be happy to give you (and anyone else in the same situation ) more details.
For the fee status questionaire, what did everyone (British citizens sorry) put for reason for residence, I put place of birth - the question obvously designed for us but I thought I needed to write soemthing !? :/