There's an image that's been doing the rounds that's got a number of people a bit jumpy about their contactless cards. It shows a person carrying what looks like a contactless card reader, and should they tap it against your pocket, they can make off with small amounts of your money.
This is the image.
If you haven't used a contactless card (which most new bank cards are, these days), basically, small transactions can be authorised without a PIN code.
Now, this image has been passed around the UK without saying where the photo was actually taken. A little digging sees that the original photograph was taken in Russia. That's not to say that scamsters over here haven't thought of the same idea though.
Of course, on sites that aren't exactly kosher, there's customised Point of Sale machines on sale, so this could be a problem if criminals conceal them more successfully than this guy.
What Can I Do To Stop This Happening?
Well, the solution to this, should you feel you need one, is very simple. You can either buy a special wallet that will stop people from being able to do contactless payments through your pocket, or get an insert.
There's a load on Amazon, which you can see here. Or, if you want to shop elsewhere, look for a RFID wallet. They're the ones that will stop this nonsense. If you don't want a new wallet, you can just buy a credit card-sized insert, like these. The solution is cheap, so don't worry yourself unduly.