Yes! Many great charities, political organisations, and nonprofits in the United Kingdom are using Donorbox.
Donorbox also has the ability for your UK donors to mark donations as Gift Aid. I
Your can turn on the Gift Aid earmark in your Donorbox account settings. https://donorbox.org/org/edit
This will display a UK designation check box during the donation checkout process.
In the UK, Stripe charges a low rate of 1.4%+ 20p for European cards. See Stripe's pricing detail at https://stripe.com/gb/pricing
Stripe may also offer a discounted nonprofit rate for registered nonprofits. Please email firstname.lastname@example.org for details