LONDON - ​Mastercard is exploring the sale of a majority ​stake in its UK ‌payments subsidiary Vocalink back to British banks as it responds to concerns about a critical asset being under US ownership, the Financial Times reported on Monday ​citing ⁠people briefed on the talks.Vocalink is responsible for running much of the UK retail payments system. It designs, ‌builds and operates bank account-based payment systems in Britain, processing over 90% of salaries, more than 70% of household bills and ⁠98% of state benefits, according to its website.

Mastercard bought Vocalink in 2016 for £701 million ($937.38 million) from a consortium of British banks. According to the FT report, a deal for a 51 ​percent stake could be worth about £400 million ($534.88 million).

DeliveryCo, an entity backed by many of the ​UK’s leading banks ‌and payment companies is believed to be a potential buyer, the report said. Reuters could not ​immediately ⁠verify the report.

Mastercard, Vocalink and DeliveryCo did not immediately respond to a ⁠Reuters request for comment outside regular business hours.

The reported stake sale comes amid the Bank of England's growing concerns about the lack ⁠of competition for Mastercard and Visa, which ​handle a majority of British retail payments. The Bank of England fined Vocalink £11.9 million ($15.92 million) last year for falling short of its obligation ‌to have adequate ⁠risk management and governance ​arrangements.