I joined the school banlk when I was about 10, it was the Trustee Savings Bank. I stayed with the bank until after I left school and then went to the Midland as my sister worked there (we didn;t get discount mind). Now my LLoydsTSB bank says it is separating and there will be a TSB again! Pointless anecdotes can be surprisingly poignant and interesting.
I too remember being in the TSB at school. We also were taken to the PO every Friday to buy a saving stamp, Princess Anne for girls and Prince Charles for boys, to save up for our holiday spends.