The link for this post is using an archive for the article on Bloomberg's website. An archive has no paywall, no subscription requirement, and can be easier to read. The original article, on Bloomberg's website is:

UK’s Paper £20, £50 Notes Expiring — What to Do With Them? How to Exchange Them? https://www.bloomberg.com/news/articles/2022-09-28/paper-20-50-notes-expire-what-to-do-with-them-how-to-exchange-them