The UK's Government Digital Service has replaced Stripe with Adyen as its payment processor for GOV.UK Pay, a service that allows residents to make payments to local authorities and services. The three-year contract is worth up to £25.3 million and covers around 17% of payments made through GOV.UK Pay. The change will introduce new options, including pay by bank, which transfers money directly between bank accounts using open banking services. This move aims to provide a more efficient and cost-effective payment system for users.