My high school diploma, is a cambridge university G.C.E board. I've done three a level exams.am i eligible to apply for colleges likefergie

I've completed three 'a' level exams in business studies, english and Psychology and 5 'o' level exams, english, maths, physics,business studies and travel and tourism. I wanted to know if i was eligible to apply to colleges like fergusona and s.p? For B.A program.