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For several years now, London Underground commuters have been using the Oyster card instead of conventional tickets. The Oyster card operates in the same way as the proposed ‘Tap and Go’ debit card. Like the Oyster, the new cards work by touching the card against receptor pads. Tap & Go will function the same way, but instead of turnstiles, they will be used at checkout tills for items totalling £10 or less.
Money is immediately transferred to the retailer from your account. The cards set to carry this new technology will be either credit cards or debit cards.
(Experiments included using the radio wave technology in mobile phones, which could be waved in front of checkout tills although this was deemed too insecure!)