This is a useful timeline.
The events become ever more focussed on H&F but that is understandable since they are responsible for the bridge.
Re-reading this document, I realise it answers a nagging query I had about the user numbers.
It says,
Before the limit was put in place [in 2015 and before the its closure], the bridge was used by 22,000 motor vehicles including 1,800 buses every day.
Then later it says.
Up until 13 August 2020, 16,000 pedestrians and cyclists crossed the bridge each day and dozens of boats travelled underneath it.
These two numbers are often blurred in later reporting. I will see if I can find a report that shows how many pedestrians and cyclists used the Bridge before its closure.