蜜芽传媒

More than 拢9 billion was spent in the first half of 2016 using contactless cards.

It is a technology that continues to soar in popularity as more pubs, retailers, food outlets and transport networks accept payments with just the tap of a bank card - no need to remember a pin code or sign your name.

Claer Barrett is the Personal Finance Editor at FT.com. She told Carolyn Quinn there is a danger people will pay more than they should if they fail to check the amount before tapping their card.

(Photo: Contactless card payment. Credit: Barclaycard)