While it is true that Oxford is an extremely crowded place in which to try to expand, £40 million has just been spent purchasing the Radcliffe Infirmary site and £60 million allocated for its refurbishment. A nice central Oxford site.
At the same time, I believe that the Upper Heyford site - including housing for umpteen thousands, all related services, sports facilities, a hospital and acres of office accommodation - is still seeking a buyer with a price tag of some £15 million for the lot.
All that and not that far from the city. Does the university always have to expand solely within a five-minute walk of the Radcliffe Camera?