The world's first cash machine dispensed £10 notes in a London suburb in 1967

Barclays installed the first ATM outside a branch in Enfield, north London, on 27 June 1967, paying out cash against paper vouchers marked with mildly radioactive carbon-14 ink rather than a magnetic-stripe card. Inventor John Shepherd-Barron reportedly got the idea in the bath, deciding a cash machine should work like a chocolate vending machine, just for money.

— John Shepherd-Barron, Automated teller machine — Barclays Bank, Enfield, 1967