My first bank was Giro, when it first started. It was sold to Alliance and Leicester... Then Santander bought A and L.
I also had an account with Abby.... Now Santander.
I have a Co-op bank account, the best one out of all of the above. Easy plain English 'rules' Friendly service/advice. Not 'pushy' with add on selling. Only been with them 5 or 6 years and so far excellent.