At the 'banking' brief at RAFC in 1968, which was given by someone from Lloyds Cox's & Kings,the 'advice' he gave was for people to open accounts with them, as they were a paying agent and it would be 'simpler' for all concerned...
I told my fellow Flt Cdts that the advice I'd had from my own bank manager was to stay with them "....because you'll be a name, not an account number".
Somehow this got to the ears of the speaker, because a little later some weasly little Cadet Wing Flt Cdr came sniffing around, determined to know who'd said it. But even though I'd only been at Cranwell for a few days, I knew already when to keep shtum!
Stayed with the same bank for the next 20+ years and only changed to another branch when mine was absorbed by another.