Applicants must first be accepted by the faculty board, committee, or department concerned with their field of study and are then passed to the College which must satisfy itself, amongst other things, that the tuition fees for a graduate's proposed course of study can be met and that he or she can also meet the costs of living in Oxford for the period necessary to complete the course and of any incidental expenses, such as fieldwork.
Applications should be submitted online, where you will be able to upload electronic copies of supporting materials (including written materials, curriculum vitae etc). Please refer to the Graduate Admissions application guide, available here: http://www.ox.ac.uk/admissions/graduate/applying-to-oxford/application-guide
For further information please contact the Admissions Officer at admissions@bnc.ox.ac.uk or if you have a more general Graduate Admissions question, use the details below, or contact your Department.