As most universities ask for a 1st or a 2.1, I wouldn't like to say that a 2.2 would get you in to any university, but my university requires a 2.1 and there is a student on my MSc course (social sciences) with a 2.2. So I do think you have a good chance of getting onto a Masters course, especially with your relevant employment experience, that shows that you are commited to working in that area; the interview is important as well. I think that you have nothing to lose by emailing the course leaders/admission tutors of the courses you are interested in and introducing yourself, good luck.