Just to give the other side of what DancinBallerina has said (for anyone applying for social work in the future) - I didn't have any academic qualifications related to social work, I had a levels in history, english lit, latin and biology. I was still offered a place at the University of York and graduated this summer. I think they take every case on its own merits, don't let anything put you off if you want to do social work. There were also plenty of mature students, students with no A levels, students with little experience, a proper mix at York. If anything, I think they care more about your experiences - personal and work - than your academic background.