A number of BSc Joint Honours programmes have their own UCAS codes, but fall under the umbrella of Natural Sciences. Students will graduate with BSc Honours in the two named subjects, so BSc Honours in X & Y, where X and Y are the subjects in question.
More information about each programme can be found below:
Biology and Chemistry, CF11 Biology and Chemistry CF11 - Durham University
Biology and Psychology, CF17 Biology and Psychology CF17 - Durham University
Chemistry and Mathematics, FG11 Chemistry and Mathematics FG11 - Durham University
Chemistry and Physics, FF13 Chemistry and Physics FF13 - Durham University
Computer Science and Mathematics, G411 Computer Science and Mathematics G411 - Durham University
Economics and Mathematics, L125 Economics and Mathematics L125 - Durham University
Mathematics and Philosophy, GV15 Mathematics and Philosophy GV15 - Durham University
Mathematics and Physics, G427 Mathematics and Physics G427 - Durham University
Philosophy and Physics, VF53 Philosophy and Physics VF53 - Durham University
It is possible to move into the more general Natural Sciences degree from all of these programmes, which would usually involve specialising in one subject more than the other, if student interests change as their studies progress.
Further Joint Honours degrees are available within the general Natural Sciences programme (CFG0).