Could it be to do with slang meanings? Barnet is hair (in cockney rhyming slang, from "Barnet Fair") and a fulham is a loaded die. I have no idea is "sunderland" is a slang term though.
Thank you Paul & Torquemada for your replies.
I too thought of slang 'cos of Barnet, but I feel it's something to do with the dreaded 'footie'! If you have any more thoughts please contact me again, and....have a great weekend