A level subject choices

It depends on what kind of field you are planning on going into. If you are going into STEM at Imperial or Oxbridge, further maths is pretty necessary. If you aren't planning on studying medicine or something related to chemistry, like chem engineering, there's not really a point in doing it. I would also recommend bio and chem for a medicine student. French does seem like a bit random - considering its ur only non-stem subject and I personally would drop it or learn it independently. Most people I know who are doing CS, maths or engineering at Oxbridge take cs,furthermaths,maths,physics. Most common one for medicine is bio,chem,and maths.