But a small correction: we support the local currency of your company. If you are based in the UK, you'll be able to accept GBP. If you need support for other European currencies, you can contact us and we can certainly look into it.
About the PCI compliance: you don't have to be PCI compliant, for one reason: the payment data never reaches your server. Our javascript bridge solution takes care of sending the data directly to our payment servers (which are PCI compliant), so you don't have to be.
I'm not sure what you mean by not being frictionless for UK companies. Is this about the points above? If not, please do let us know what your concerns are :-)