NatWest has apologised after customers found themselves locked out of the bank's mobile app earlier today. Around two million people use the service, with the problem also hitting customers of Royal Bank of Scotland RBS and Ulster Bank, which are part of the same group.
The bank is still trying to work out what caused the problems.
All our mobile banking applications are now running normally. We apologise again for the inconvenience caused to our customers.
As NatWest deals with technical problems the boss of new financial watchdog, the Financial Conduct Authority, tells me he's worried that the banks' systems are "relatively fragile".
Martin Wheatley, the boss of the FCA, which comes into being on April 1 and replaces the FSA, says he is concerned the industry has underinvested in IT. Wheatley also tells me that executive pay at banks is too high and the compensation structure still wrong.