Another vote for Starling here. I’ve bounced my business account around a bit over the last few years; first with TSB, then with Santander (Open Banking Interface) and moved about six months ago to Starling (Webhooks Interface) because they are free and I wanted to experience a challenger bank. Quickfile has worked well with all of the banking platforms.
The only drawback I have found with Starling is that there isn’t an associated business saver/reserve account, so I have put spare cash in Hampshire Trust One Year bonds, which pay 1.85%.