Google Cloud has restored services in its London region after an outage disrupted UK banks on Tuesday.

The company has apologised to affected customers and plans to release a report of the incident, BBC News reported.

Google traced the outage to a power event at a third-party facility in its europe-west2 region.

Problems began shortly after 7am UK time, its service dashboard shows. Services in one zone went offline, and some others across the region saw errors.

Revolut, Lloyds Bank and HSBC each confirmed that customers had problems. By just after 8am, an outage tracker had logged more than 1,500 reports about Revolut.

Revolut says its services are now fully restored. It says customer money and data remained safe throughout.

Customers also flagged online banking issues at Lloyds Bank, Halifax and Bank of Scotland.

Lloyds has not named the cause. On Tuesday, it said it understood the root problems had been fixed and expected a return to normal soon.

Prof Feng Li of Bayes Business School said the episode shows how dependent economies are on a few cloud providers.

He said outages are bound to happen in complex cloud systems. The real test, he added, is how well the damage is contained, how soon services recover and whether customers have a fallback.

Featured image: Edited by Fintech News Switzerland, based on image by Google via its website and wagyu_t via Magnific.