RBS, NatWest and Ulster Bank customers using mobile apps were locked out today after another IT failure.
The bank has about two million customers using its mobile banking apps.
Customers were unable to access mobile banking apps in the morning (Thursday 28 March 2013). By the afternoon, RBS said the services were running normally and apologised to customers.
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RBS said: "We have been working hard to fix the problems affecting our mobile banking applications this morning.
"Most of the applications are now back up and running normally, although there are still problems affecting customers with the latest version of the iPhone and iPad applications.”
Earlier this month customers of Royal Bank of Scotland (RBS) and NatWest experienced disruptions to ATM, online and telephone banking services following a hardware fault.
This followed software issues that struck RBS, NatWest and the Ulster Bank in June 2012 which meant customers had major issues with their accounts. The glitch in the CA7 batch process scheduler ended with 12 million customer accounts frozen. The problems cost the bank £175m.