In the first half of 2015, £2.5bn was spent in the UK using contactless cards. I’ve lost mine, and I’m now living life in the slow lane Here is my problem. I have lost my debit card. This might seem like a minor hindrance. I haven’t, say, lost a limb. But I have lost the means to go about my everyday life as I usually would. I rely on my contactless debit card as if it were a chip in my wrist. (And I don’t have a credit card, because I was always taught never to have credit cards.) I use my contactless debit card for everything. When I encounter people who do not have contactless, I reel in horror. It’s almost as if they don’t have mobile phones. Or faces. I get wildly irritated by shops and pubs that do not accept card payments, because it’s 2016. In supermarkets, if I have to use chip and pin, I can barely contain my fury. In a world in which being five minutes late to a tweet is considered embarrassingly tardy, it takes an awfully long time to use a chip and pin machine. It ha...