PS
I did JOCC in early 03 and got sent a letter a few months later from the SO1 with a Certificate in Management from the CMI attached. Didn't cost me a penny but doesn't mean anything to me either. A quick search on their website shows the Diploma is a step up from the Certificate. But unless you get BA/BSc after your name then no-one will believe this is degree standard.
ScapeGoat
Tried a link but the site has changed since I last looked but I'm sure they have a site.