Grades needed for Nottingham, two completely different things?

I've recently started about thinking of applying to nottingham this year (for history of art) and I ordered the undergrad prospectus a while back and it said ABB. Speaking to my HoA teacher the other day she said it was BBB/ABC which I thought was odd and went to investigate. On the special PDF page for the history of art course it says entry requirements are ABC/BBB. So, anyone have any idea which is most reliable? The specialised PDF or the general undergrad prospectus? I was thinking of emailing them, but came here first as I imagine what with all the newbies coming right now they'd be rather busy and wanted to see if any other people had this?