If you want a bank that repeatedly breaches their contract with you and does their damnedest to avoid giving out information in response to a Subject Access Request, try Smile. Or if you'd prefer one that ignores attempts to change address or close the account, try Abbey^W Satan^W Name-of-the-week. Halifax is one to avoid too.

Unfortunately, I'm not sure there's a bank I could actually *recommend*. My business account with HSBC works fine, but I've not tried their personal banking.