Usually universities in the UK like to see some recent academic attainment, although depending on the course and your professional experience this may be less important. With a 7 year gap though, I imagine they would probably want you to complete e.g. one or two OU modules, an Access to HE course, A-levels, or apply for a course with a foundation year at that university. I would recommend you spend some time exploring these options to see which might be most appropriate to you. In the case of the foundation year, I'd recommend contacting universities offering a foundation year for the course you are interested in and enquiring about their requirements and whether you would be considered suitable to apply to that with your current background.