MSc Psychology without a degree? Watch
Can people do a msc psychology course with a degree in business management?
I have a degree in another discipline but am now doing a Graduate Diploma in Psychology which upon completion provides the graduate basis for registration (GBR) with the BPS. This GBR status is something you need if you wish to pursue a career in psychology. Basically, my course is the equivalent of doing the three-year undergraduate course in one year.
Perhaps you might want to look into doing a Grad Dip as it provides you with a good grounding in psychology (if it's something you haven't studied before). You can find more info on the BPS website