Could have something to do with the fact that UK banks don't levy annual fees equal to around 250 THB for their credit and debit cards, whereas Thai banks do. As a result, making card payments contactlessly, which I certainly found an extremely convenient and user-friendly process on my last trip to the UK this time last year, has, sadly, not caught on in Thailand. Here, the only alternative to making cash payments is by aiming and then firing e-pot shots at a QR code with your smartphone, which, in my experience, can prove to be a hit and miss affair thanks to erratic banking apps which Thai banks seem determined to ram down our throats come hell or high water.