Lost bank account from 1969

TheBanker

The old Trustee Savings Banks all eventually became part of TSB, which was its self acquired by Lloyds. Lloyds was forced to divest part of its business and re-used the TSB name for this purpose (it wasn't really the same TSB by this point). So your account could have ended up with Lloyds, or TSB, or could have just been closed decades ago.

It's worth a My Lost Account query to TSB, if Lloyds couldn't find the account. But other than that I feel you're flogging a dead horse. There have been multiple mergers and takeovers since your account was opened, Your paper records will have been migrated to computer at some point, then migrated between systems several times since. 

BooJewels

Whether it has any value perhaps depends on the organisation it ended up with and the type of account they allocated it to.  My aunt found an old school savings account of her late husbands with a few shillings in it from the 1930s.  After a bit of digging on-line we found it had become Bradford and Bingley, then Santander.  She took the book in and after they'd calculated the interest, she got over £68 back.

So when I found one of my Dad's with 4 shillings in it, we decided to repeat the process - his had become NS&I and after a lot of form filling and sending the original book back, they decided that I was due a pay out, so I waited with baited breath.  I logged into the bank one morning to find an NS&I credit for 20p, followed after a few days by a letter saying that they'd repaid the 4 shillings, but didn't pay interest on amounts less than a pound!

EarthBoy

BooJewels said:

...but didn't pay interest on amounts less than a pound!

That is, and was, the case with many, if not most, banks and building societies. It was certainly like that in the late 70s when I first opened bank accounts.