Waitrose customers were unable to pay by card on Tuesday evening, as the Verifone payment system crashed.
Customers across the UK took to social media, saying that stores’ card systems had gone down and they had been asked to pay with cash. A Waitrose spokesman said: "We were among a number of businesses impacted by intermittent failures to Verifone's card payment system. The situation has been resolved, however we are very sorry to customers for the inconvenience."
Verifone commented: "Earlier on Tuesday, we experienced a service outage that affected connectivity to our Wynid gateway in France, and Ocius gateway in the UK. Services are now back to normal, and both datacentres are now receiving transactions. Our engineers are continuing their investigation to determine the root cause of the outage. We apologise for the disruption caused.”