Oxford and Cambridge can be a little strange about the degrees they award, almost entirely due to tradition. Undergraduate degrees almost all confer a BA at Oxf

Oxford and Cambridge can be a little strange about the degrees they award, almost entirely due to tradition. Undergraduate degrees almost all confer a BA at Oxford and they don't award BSci or (I think) BEng so reading a STEM subject would still get you a BA. Stephen Hawking read Natural Sciences for what it's worth.