Give a stream of consciousness and then the final answer. The Bank of England 1 note was a banknote of the pound sterling. After the ten shilling note was withdrawn in 1970 it became the smallest denomination note issued by the Bank of England. The one pound note was issued by the Bank of England for the first time in 1797 and continued to be printed until 1984. The note was withdrawn in 1988 in favour of the one pound coin.

Answer this question: when did the old pound notes go out of circulation?
This is the relevant information: The note was withdrawn in 1988 in favour of the one pound coin.
So, the final answer is 1988.