Nationwide has apologised to its customers who were unable to access their online and mobile banking services.
The building society said the outage was caused by a “technical issue”, which occurred on Monday morning, but did not specify the numbers of customers affected, PA reports.
A statement from Nationwide said: “We are currently experiencing a technical issue with our internet bank and mobile banking app and we apologise for any inconvenience this may cause.
“Customer service is the highest priority for Nationwide and the issue was identified quickly and we are working on restoring full service as soon as possible”.
Several Nationwide customers vented their anger and frustration on social media, complaining of not being able to log in to their accounts and criticising the firm over its poor customer service.
One Twitter user described the situation as “absolutely shocking”, adding: “It’s happening every week, a new problem. Their internet service is absolutely shocking! I have no accounts when I log in.”