New £10 note
If you have any of the old style £10 notes, these will stop being legal tender at 11.59pm on 1 March, 2018.
Don't worry if you find any old style £10 notes after this date. The Bank of England guarantees that all UK banknotes will hold their value for, as they put it, "all time". You will therefore be able to exchange any old notes with the Bank of England in London, in person or post.