Banks use Cockney rhyming slang

Many ATMs in London offer you the choice of languages to conduct your transaction in, but there are now five cash dispensers in East London where you can choose Cockney rhyming slang as your language. You'll be asked to enter your Huckleberry Finn (PIN number) and whether you want to see your balance on the Charlie Sheen (screen) or whether you'd prefer to withdraw some bangers and mash (cash). Of course, first you have to enter your bladder of lard (card).

Here's a picture of one of the ATMs.