Customers of Lloyds Bank, Halifax, and Bank of Scotland will be able to use Apple Pay from today.
The three banks make up Lloyds Banking Group, Britain's largest current account provider. According to its research, one in three customers expect to be using a mobile device to make payments on a day-to-day basis within the next five years.
Apple's pay-by-iPhone mobile payments system was launched in the UK back in July but not all banks were ready to start offering the service at the time.
The system allows iPhone 6, iPhone 6 Plus, and Apple Watch owners to use their devices to pay for goods in stores that accept contactless payments. It also allows some iPhone and iPad users to make in-app payments.
Today's announcement means the majority of UK banks are now offering their customers Apple Pay.
TSB is still listed by Apple as 'coming soon' - it has previously said that it will offer Apple Pay later this year.
The other significant omission from Apple Pay's list of UK partners is Barclays, which has its own mobile payment system, although the company has said it will offer Apple's service "in the future".
More on Apple Pay and mobile payments
- Apple Pay launches in the UK
- Why 2015 may not be the year of Apple Pay after all
- Apple Pay comes to the UK, but will your bank offer it?
- Barclaycard's PayTag 'upgrades' your phone for contactless payments
- Why mobile payments is like Wacky Races -- and why Apple is steering clear
- The next digital battlefield: Your wallet