Colleges within universities in the United Kingdom can be divided into two broad categories: those in federal universities such as the University of London, which are primarily teaching institutions joined in a federation, and residential colleges in universities following (to a greater or lesser extent) the traditional collegiate pattern of Oxford and Cambridge, which may have academic responsibilities but are primarily residential and social. The legal status of colleges varies widely, both with regard to their corporate status and their status as educational bodies. London colleges are all considered 'recognised bodies' with the power to confer University of London degrees and, in many cases, their own degrees. Colleges of Oxford, Cambridge, Durham and the University of the Highlands an