Hasn't anyone told you those tenners aren't legal tender anymore
Barclays still take them over the counter
And, you can always take them to bank of England in London, who will exchange them. A £10 is always worth £10, even if its been updated 6 times since then, and the BOE will always exchange for the latest notes / bank transfer
Back on topic.... bugger all so far, but we don't have many domestic customers.