Tesco Bank’s online and mobile banking services crashed yesterday, locking out 5.6 million customers for four hours in the middle of the day.

Unlike the TSB outage in April, where customers couldn’t access their money for almost two weeks, Tesco Bank customers could still make payments with their cards, and use cash machines and telephone banking.

In a statement, Tesco Bank said: “We apologise to customers who were unable to access online and mobile banking earlier today. These services are now working as normal and we would like to thank customers for their patience.”

A spokesperson for the bank, which is owned by the supermarket chain, said the outage was caused by a technical issue and not a cyber attack, but didn’t provide any more details.

It’s been a bad few weeks for financial IT systems in the UK: first TSB, then a massive Visa outage on Friday that prevented credit card and debit card users from making payments across Europe, and now Tesco Bank.

TSB’s technical problems are still ongoing – and their boss, Paul Pester, is facing down criticism from both the FCA and MPs this week. MPs have also demanded more information from Visa Europe chief Charlotte Hogg.

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