Two UK banks–Royal Bank of Scotland and Nat West–are now allowing customers to login to their mobile banking apps using Touch ID, reports the BBC. The updated RBS app is expected to hit today, with the Nat West one following tomorrow.

RBS and NatWest customers must activate the feature with their security information, but would only need to use Apple’s Touch ID thereafter.

The banks–owned by the same parent company–said that use of Touch ID is subject to a number of security safeguards … 

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First, customers choose whether or not to activate fingerprint login, and have to use their existing login details to do so. Second, Touch ID would be disabled after three failed attempts, customers having to use their security details to re-enable the option. Third, transaction and functionality limits apply, requiring manual login for some operations.

Around 880,000 customers currently use the iOS apps on phones equipped with Touch ID sensors, said the banks.

It was rumored yesterday that the upcoming 12-inch Retina MacBook Air will be the first Mac to feature a Touch ID sensor, with plans also to include them in the Magic Mouse and Magic Trackpad.

Update: One of our readers notes in the comments that Touch ID functionality was silently added to his app, without an App Store update – thanks, Joe.

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