My work (which only has 99.9% uk based clients) has an Exchange server that automatically blocks any email that isnt one of the above, plus .co.uk and .uk.com

Saves on so much spam, 1000+ per day. I think twice in 20 years we had to manually unblock a .fr and .au domain

My bank did the same… except not really. A bunch of functions still opens in the browser, but you can only get to them via the app, not directly using just the browser.

Another option for you would just be “buy a secondhand cheap phone for banking and nothing else”

There’s a few places like that in Lanzarote. Pretty cool.