App not available on Spanish App Store
My Apple account is registered to my Spanish address. I have a bank account in the UK with Nationwide B. S., and want to download the Nationwide banking app.
The app is listed on Apple's UK App Store, but is _not_ listed on their Spanish App Store. Nationwide tell me that they place no geographic restrictions on the downloading of their app.
So how can I download to my iPhone using my Spanish Apple ID?
(I am aware that I can swap to a UK Apple ID, download the app, and then swap back to the Spanish ID. But this is laborious and error-prone. I'm looking to avoid this.)