Not even a current account - just a card/e-card (I don’t even carry the card, just have it in my google wallet). You can instantly add GBP and convert to whatever currency you need at good rates using the app. The interest-earning bit is simply another ‘jar’.
https://wise.com/
Using a Wise debit card for non-GBP spending. Incredibly cheap fees compared to standard bank cards or exchanging cash. Also offering 4.12% on credit balances.