What is the plan for British and Commonwealth money after the Queen passes?

So, I was at a Pink Floyd cover band concert last night and the best part was the video. They showed a lot of images of British money during the sax solo from, well, ‘Money.’ And I got to thinking about what will happen to the paper currencies of Britain and plenty of other Commonwealth nations that feature the Queen on their bills.

I know this will have been addressed in the past, but there’s surely more currency in circulation now than during earlier changes.

Does anyone know what will happen? Is there a plan?