She said: “There were transactions from Waitrose, there isn’t a Waitrose near us.
“I kept logging out and back in, and every time the details changed.
“I can see another person’s bank account, he got paid £6,000 yesterday. Others, I can see their benefits payments, their National Insurance numbers, I can see where they work, almost their whole identity.”
Lloyds Bank customer Carl Lewis told the BBC opening up his app on Thursday morning to see transactions unconnected to him made him “very concerned about the safety of my details”.
“It was the full history of the account that I could stroll through month by month, including direct debits to the DVLA where the car registration number is shown,” he said.
Similar issues have been flagged to Lloyds Bank, Halifax and Bank of Scotland by customers on social media.
“This morning we incorrectly showed transaction information from some accounts to other customers in Internet Banking and the mobile app,” the Lloyds Bank account on X has told some concerned users.
“We’re sorry this happened. This issue was quickly identified and resolved.”
Outage tracking website Downdetector saw a spike in reports of issues with the Halifax and Lloyds apps between 07:00 and 09:00.
A smaller spike was reported on the Bank of Scotland app, according to the website.
Lloyds Banking Group says it is the UK’s largest retail and commercial banking provider, with 26 million customers.