Nowadays we carry more cards than cash and things are becoming more and more easier.. Everything is starting to become contactless and automatic which sometimes causes trouble. For example, if you have a contactless bank card in your wallet along with your oyster travel card (also contactless) it can interfere and clash with each other when trying to tap at a payment facility or train station. In order to avoid this simply use an old piece of card (NOT contactless) for example a business card you won't use and wrap it around with several layers of Aluminium Tin Foil. Wrap the entire card and place it in between your contactless debit card and your oyster travel card. So next time you tap at the train station you won't be faced with a card clash as the foil will prevent interference.
