British undergraduate degree classification
In the United Kingdom, medicine is usually taught as an undergraduate course, with graduates being awarded a master's level qualification: normally the conjoined degrees of Bachelor of Medicine, Bachelor of Surgery (MBBS, BM BCh, MB ChB, etc.) although at Queen's University Belfast (and universities in Ireland) Bachelor in the Art of Obstetrics (BAO) is added, and at some universities only the Bachelor of Medicine is awarded - all of these have equal standing. Unlike most undergraduate degrees, the MBBS is not normally considered an honours degree, and thus is not classified into first class honours, etc. Students may be awarded "Merits" and "Distinctions" for parts of the course or the whole course (depending on the institution) and "Honours" may be awarded at some institutions for exceptional performance throughout the course (as a grade above Distinction).
British degree abbreviations
Conversely, some bachelor's degrees in the "higher faculties" at the older universities in the UK (e.g. those other than arts at Oxford and Cambridge) are postgraduate qualifications (e.g. the BCL and BMus at Oxford). Many have been changed to the corresponding master's degree (e.g. BSc is now MSc at Oxford), but only within the last generation. The BD (Bachelor of Divinity) remains a higher degree at some universities (e.g. Oxford, Cambridge, St Andrews and, until recently, Durham) but is an undergraduate degree at most (e.g. London, Edinburgh, Aberdeen and Glasgow).