After have a spat of bad luck this week my luck changed when I got some money out of an ATM this afternoon. Instead of the £80 I had asked for it churned out £160 in crisp £20 notes. I have checked my bank account online and have been billed the correct £80. Will I have to pay back the other £80? It appears that who ever loaded the ATM miss labeled the cassettes, assigning a cassette of £20's as a cassette of £10's.