Apps from a foreign app store

What’s the easiest way to buy/download apps from a foreign app store these days?

There’s an app in the UK app store I want (not available anywhere else) and all the methods I’ve googled appear to be no longer valid.

Has anyone done this?

UK appleID afaik. Bu you’ll need UK credit as well. Maybe someone over there could buy you a voucher? I’ve never got anything from the UK store, not even a freebie, but I imagine that is how its done,

[edit] OK I can confirm that getting freeibies from the UK store is easy. So you’ll just need to sign up for a UK ID, and then if what you want is a paid app, start looking about for UK itunes vouchers.