in it's base version, Revolut is free, yet they surely try to convince you to pay for a paid plan, use their depot, and other stuff... However the only downside worth mentioning is getting less interest on the savings account. Or did you refer to them being a UK bank? In that case: Revolut exists in multiple countries - my account is in Lithuania, yet still fully managed in €. They nowadays also have a german banking license (giving you a DE-IBAN). Accounts themself can be in on of, I dunno... 33 different currencies or so?

Another option worth mentioning would be Trade Republic, however I've never tried them myself.