A failure across Google Cloud services in western Europe disrupted websites and mobile banking on Tuesday, with the UK fintech Revolut and high-street lender Halifax among the companies reporting problems.

Google said on its Cloud Status page that multiple services in europe-west2 were producing elevated errors and intermittent network failures. The problems were first detected at about 07:00 BST, according to bdnews24, and Google said its engineers were still investigating without a workaround.

Revolut told customers its app was partly unavailable, with sign-in, card payments, transfers, cash withdrawals and cryptocurrency services affected. The company said customers' money and data were safe and that work to fix the disruption had begun when it was identified that morning.

Halifax said it was aware that some customers were having trouble with its app and website but did not say whether the faults were connected to Google's cloud problems. DownDetector, an outage-tracking service, recorded a sharp rise in reports across several websites on Tuesday morning, although it was not confirmed that every affected company relies on Google Cloud.

Google had not given a timeline for restoring services or identified the cause by Tuesday afternoon. The episode again showed how a fault in one cloud provider can ripple through payment and information services used by millions of people.

Cloud providers sell capacity in named regions so that customers can place services close to their users. A problem in one region can therefore take down every application that has not been designed to switch to another.