For Masters 1 (1st year), you need a bachelor's degree or equivalent qualification. The admission criterion for Masters 2 (2nd year) is a Masters 1 or equivalent qualification. Your previous studies must be relevant to the masters course you wish to take.
Engineering students who want to go onto doctoral research can take a research Masters 2 during the last year of engineering school.
A masters can also be taken over one or two years as part of a continuing professional developmentprogram.