UKC

I’ve rarely used any cash in last two years and had forgotten I had any paper bank notes still until I found some £20 notes last week.

Therefore, just a early reminder to others that 30th Sept is last date to spend paper £20 notes (also £50 ones) if you happen to have any stashed away and forgotten. As an aside I discovered one £20 note I was paying into my current account was not legal tender, or so the teller told me; wonder how I got that one.

Eh? No twenties after September? 

New ones coming. You can always change old.ones too, most banks or in extremis the Bank of England (anyone know if tbere is a teller or whatever who handles this?)

Old paper ones are being withdrawn. They are being replaced with the new plastic ones. 

New £20 polymer notes came out  2 years ago. It’s the old paper ones that are getting withdrawn.

I just went to my local branch where my current account is as it was easiest for me. The postal address, if that is what you’re asking(?) is shown here - https://www.bankofengland.co.uk/banknotes/exchanging-old-banknotes

Money never loses its value. Shops will no longer be able to accept them as payment as they will no longer be legal tender. You can still take them into a bank and deposit them or exchange them for current legal tender, whenever you choose.

Aha!

Been a long time since I was last there but it's just inside the entrance (and I think it's on the right?)

As you go up to the big metal entrance doors there is security there who can help you, ask for cashier for old notes (they're used to it). Haven't used the cashier myself but security were approachable and friendly/helpful when I've been in a few times in past

Likely you can use your own bank, as a customer they should help you

Eeeeekk!!!  Just read Climbing Pieman's link, that they pay you via SWIFT    Maybe DON'T go there or your own bank might charge you £20 or something?    (unless it's a significant wadge of cash - if so let me know and I'll help carry the suitcases, I might suddenly start running though)