Apple Pay in the UK with have a limit per transaction of £20 when the service launches, this is due to the UK rules on contactless payments.
The cap for contactless payments is expected to be increased in September to £30. so Apple Pay will probably also rise to a £30 limit per transaction in September as well.
This will change in time as Apple Pay will offer higher limits on contactless payments in the UK, although the merchant will need a terminal which supports higher payments, the majority of the terminals in the UK at the moment only support the current limits.
Apple will launch their new mobile payments system in the UK next month, the service will allow you to make mobile payments with your iPhone or Apple Watch.
Apple has already managed to sign up the majority of the UK’s high street banks for their new mobile payment system and more are expected to be added to the list at launch.
Source Wired