Barclays bank has confirmed it is experiencing IT problems which it says is affecting its app, online banking and payments in and out of accounts.
The bank says it is also unable to provide help via telephone or its “Message us” service.
Cards and cash machines can be used as normal.
Barclays has not explained the cause of the outage, or how many customers are affected.
It has apologised for the problems, and says it is “working hard to fix the issue”.