In the opening keynote for WWDC 2015, Apple announced that its mobile payment system would reach the United Kingdom in July. Today, the 14th, the Apple Pay officially started operating there.
This is only the first international expansion of the system, and for now Apple has not announced other future plans for it, although we know that, at least here in Brazil, it seems that negotiations with banks have started a while ago.
In the UK, Apple Pay lands with support for the three major credit card brands (Visa, MasterCard and American Express), several major banks (with the exception of Barclays, which has already confirmed that it will be entering soon) and more than 250 thousand establishments. It is curious that, in this initial phase (for security reasons), purchases through the system cannot exceed 20 GBP (about R $ 100) this limit will be increased to 30 GBP (~ R $ 150) by September.
As NFC requires, physical purchases via Apple Pay require an iPhone 6, iPhone 6 Plus or Apple Watch.