COVENTRY MESSAGE BOARD

The old paper £20 note is to be removed from circulation 30th September 2022.

Source: https://www.morningadvertiser.co.uk/Article/2021/06/24/When-can-you-use-the-paper-20-until (may require sign up)

It's a trick to get people to take their savings to the bank so they can be reported for drug-dealing, money-laundering, having undeclared income or undeclared savings. That even applies to quite small sums as some people have already found out.