LONDON—The Bank of England might strengthen its controls on cloud data providers and other technology firms to counter possible risks to the stability of the financial system from the rise of fintech, Deputy Governor Dave Ramsden said. The Bank of England (BoE) has expressed concerns before about the reliance by financial firms, especially fintech startups, on third-party technology companies for key parts of their operations, and Ramsden said this scrutiny would intensify. “We plan to analyse further whether we need even stronger tools to manage the risk that critical third parties, including potentially cloud and other major tech providers, may pose to the Bank’s … objectives,” Ramsden told the Innovate Finance conference on Wednesday. Regulators globally have been tightening scrutiny of outsourced functions as they worry that core services financial firms provide to customers are vulnerable to outages at third parties. Britain’s government is keen to promote fintech as an …