It is not normally possible for you to take more than 8 course units per year. Exceptionally, you may be allowed to register for fewer than 8, but never fewer than 6, course units with the permission of the Senior Tutor. Hence, any withdrawal from courses that takes the number of units below 8 also requires the permission of the Senior Tutor. You may not under any circumstances resit or retake courses that you have already passed. If you have been awarded a degree you may not, under any circumstances, resit or retake courses in order to improve your degree.
Most courses have overlaps and prerequisites, which are listed in the course directory pages.
You may not take a course if it formally overlaps with one that you have already passed, or which you are currently taking, retaking or will resit. You may normally take a course only if you have passed all the prerequisite courses. If you have taken but not passed one or more prerequisite courses, or have not taken them, then you should seek approval from the course organiser before registering otherwise you may find the course too difficult. In Mathematical Sciences only reading courses, project courses and resitting of examinations for computing courses require validation. First year students who wish to take Economics courses should attend the Economics Department first year briefing meeting.