The Bank of Jerusalem had it's South London branch in the playground of St Catherine's, Morden.
One day after it had rained, a few people, destined to become founders of this esteemed financial institution decided to rid themselves of their coppers/ loose change by throwing them into a particularly large, muddy puddle. It was then christened 'The Bank of Jerusalem' under the apprehension that it would never need to provide anyone with a withdrawal. This went on for a few days, the bank's profits were on the verge of £5, as various investors showed off their stauts by making deposits of ever increasing sizes. The puddle was diminishing in size as time went by, thereby becoming all the more muddy, as it's lower depths began to be revealed.
Sean Garrity obviously saw himself as an enterprising blagger and decided (one breaktime)to liberate the funds from the BoJ to the horror of it's customers and all gathered. The lucre may have been filthy, but it was his !