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25 September 2026 International analysis

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Santander Online Banking Outage Leaves UK Customers Unable to Log On

Santander's UK website and mobile banking apps were hit by an outage that left thousands of customers unable to log on or use ATMs. The website service has been restored, but the mobile app disruption continues.

Santander Online Banking Outage Leaves UK Customers Unable to Log On
Santander online banking outage leaves customers unable to log on

Santander customers across the UK were left unable to access their accounts after an outage struck the high street lender's online and mobile banking services. The disruption affected both the bank's website and its mobile banking apps, leaving users unable to log on or carry out transactions. Thousands of customers reported problems accessing the Santander app, while some also found ATMs in the street unusable during the incident.

The bank's website service has since been restored, according to the latest update on the situation. However, the mobile banking app remained affected, prolonging the disruption for customers who rely on their smartphones for everyday banking. Santander has not yet provided a full explanation of what caused the outage or a timeline for when the app will be fully operational again.

The incident is the latest in a series of technical failures to hit UK banking services, raising fresh questions about the resilience of digital infrastructure at major lenders. As banks continue to close branches and push customers towards online and mobile channels, the impact of such outages has become more severe. Customers who cannot access their accounts may face difficulties paying bills, transferring money, or checking balances, particularly if the disruption extends over a sustained period.

Santander, which is part of the Spanish banking group Banco Santander, serves millions of customers in the UK through its network of branches and digital platforms. The bank has invested heavily in its mobile app in recent years, encouraging customers to manage their finances remotely. That strategy has made the app a critical point of failure when technical problems occur.

The outage also affected ATMs, according to reports from customers, adding to the frustration for those who attempted to withdraw cash or use other in-person services. The combination of app and ATM failures meant that some customers had few alternatives for accessing their money during the disruption.

Santander has not commented publicly on the cause of the outage or whether it was the result of a cyber attack, hardware failure, or software issue. The bank is understood to be working to resolve the remaining problems with the mobile app. In similar past incidents, banks have typically restored services within hours, but the lack of a clear timeline can amplify customer anxiety.

The disruption comes amid heightened scrutiny of operational resilience in the financial sector. Regulators have repeatedly warned banks that they must be able to withstand and recover quickly from IT failures, given the growing dependence of consumers and businesses on digital payments and online banking. A prolonged outage can trigger regulatory interest and, in some cases, compensation for affected customers.

For Santander customers, the immediate priority is regaining full access to their accounts. The bank has not indicated whether any customer data was compromised or whether the outage was caused by an external attack. Until the mobile app is fully restored, many users will remain locked out of essential services, underlining how deeply digital banking has become embedded in daily life.

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Harrison Whitmore

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Political Correspondent

Harrison Whitmore covers public affairs, politics, business, culture and daily news for The Bizzi Route. The role focuses on verification, context, and clear explanations for readers.