Quote from the British Psychological Society:
"If you are a graduate of another subject you have the option of completing a Society accredited conversion course instead of studying for a full degree in psychology. The Society accredits conversion courses for the purpose of graduates of other subjects wishing to transfer to a psychology career. Some of the universities offering an accredited conversion course will require a minimum of 60 credits of psychology study at degree level for you to be eligible for entry onto the course. Further enquiries must be made with the courses directly as regards entry requirements, fees, time scales, funding and duration. The universities are charged with the role of assessing the psychology content of your degree for eligibility to their course, so please get in touch with the course leaders."
Source:
http://www.bps.org.uk/careers/becoming/career/ career$_home.cfm
Details of currently accredited conversion courses (at least some of which don't seem to require the '60 credits' referred to above):
http://www.bps.org.uk/careers/accredited-cours es/accredited-courses.cfm?action=results&title =&in_id=all&level_of_study=CONV&pg_cat=&status _flag=current
Chris