Lloyds Banking Group exposed the personal data of up to 447,936 customers during an IT glitch earlier this month that allowed users to see other customers' transactions, including account details and ‌national insurance ⁠numbers, Britain's ⁠Treasury Committee said on Friday.

The incident highlights the vulnerability of Britain's digital banking infrastructure, such as apps and websites, as lenders slash physical branch networks to cut costs and shift customers online.

The bank ⁠has paid ‌139,000 pounds in compensation to 3,625 customers for distress and inconvenience, ⁠though no customers have suffered financial loss so far, according to a letter from Lloyds published by the committee.

Lloyds said a software defect during an overnight update caused the breach, which affected customers at Lloyds, Halifax and Bank ‌of Scotland, with 114,182 people clicking on transactions that revealed other users' personal information.

Britain's ⁠cross-party Treasury Committee had requested further explanation from Lloyds earlier this month over the cause of the glitch that took place on March 12.

Lloyds must provide updates to the committee within one month and after six months.