Visa and Mastercard handle about 95pc of all card transactions in the UK. - Toby Melville/Reuters Britain is accelerating plans to launch an alternative to Mastercard and Visa amid growing fears Donald Trump could pull the plug on the global payments system. The UK’s largest banks are plotting a new British platform to handle the 50 billion payments made every year after concerns were raised about Mr Trump’s ability to switch off the current system. Lenders including Barclays, Natwest, Lloyds, Santande ...