That’s ok as long as you declare the account, James has a UK First Direct account and you just need to state the account details on the tax return. But who knows if that will change after Brexshit…?
I have a Hello (BNP Paribas ) online account which is entirely free to run - if anyone wants one PM me your email and if you get an account we both get some cash - you get 80€ I seem to recall.
We also have accounts with Monabanq. This is (currently) I think the best online bank in terms of customer service but each account does cost 2€ per month.
And we use Transferwise - a lot - which is excellent.
Hope this helps! X