Thank you so much guys. I am so grateful to you.
Minerva, I've sent your reply to my niece for when she gets home from work. She'll be on the case first thing tomorrow. You have been so much help.
For the record, her conditional offer was AAB or A*BB in any subject combination. She got A*BB so fulfilled the criteria. For the same grade, she would now have been secure in a place at all the other 4 universities she origially applied to via UCAS. Unfortunately she put Exeter as her first choice. (OK, maybe lucky it's not China!)
Where did the ethics go in University Admissions? I used to run an Admissions Office back in the day (pre-email, just imagine!). It was a matter of pride in all the staff that they did the best by the potential students. Anyone from Exeter out there listening????