Some 1,500 of the bank's 3,500 UK cash machines were also incapacitated between approximately 13:00 BST and 16:00 BST. A disc array fault is believed to have been the cause of the problem, which has now been fixed. Barclays is reported to be "analysing the problem".
The bank was keen to point out that customers had still been able to withdraw cash over the counter.
The week in Risk.net, May 19-25 2017Receive this by email