Some TSB prospects could not entry on-line banking providers on Monday.
Customers on each the app and the web site obtained error messages when making an attempt to entry their accounts.
There are dozens of feedback on social media saying affected prospects have been unable to get previous the safety questions, some for a number of hours.
The financial institution mentioned it was working to repair the problem as rapidly as doable, and that solely a “very small quantity” of individuals have been affected.
Quite a few customers reported their accounts had been blocked whereas making an attempt to log in with the right particulars.
Others complained that they may not entry assist for this difficulty over the cellphone or by way of Twitter.
It was additionally prompt that the difficulties had began over the weekend.
A TSB spokesperson instructed the Moneysaving Expert website:
“We’re conscious a really small variety of prospects have been experiencing points accessing their web banking at the moment.
“We’re working to repair this for them as rapidly as doable and apologise for any inconvenience brought about. Our cell banking app stays absolutely functioning.”
It’s unclear what number of prospects have been affected by this downside however it comes simply months after an outage in April affected hundreds of users.
And final yr, a “processing error” meant wages and different funds weren’t paid into some TSB prospects’ accounts.
In April 2018, the same IT failure left as much as 1.9 million TSB prospects unable to financial institution on-line for a number of weeks.
Prospects have been moved on to a brand new system, however an investigation discovered it had not been examined correctly earlier than going stay. It price TSB a complete of £330m for buyer compensation, fraud losses and different bills.