Does anyone know if DJI offer an Express warranty repair service for UK customers?

Thanks

Phantom 4 pro

Do you mean DJI Care Refresh Express if I understand properly?
When you fill in online repair form, there will pop up a small window about DJI Care Refresh Express if you select ''I have purchased DJI Care'' if DJI Care Refresh Express is available in your country. Please check the screenshot below.
I have tried your country and DJI Care Refresh Express is available.