In regards the 1918, I believe most of the interesting stories on that front will be glimpsed via whatever is left of local histories, press reports etc. Because I get the impression that most restrictions were decided locally, eg via the local public health boards.
Here are just a few examples of the sorts of little snippets we can find on the internet that point to that sort of thing. A lot of this stuff tends to reinforce thoughts of 'the more things change the more they stay the same!'. But there are obvious differences too, and I think peoples personal perception of the disease and of any restrictions that affected their lives would have largely been more truncated than what we have already experienced in this pandemic. Partly because they experienced restrictions, disruption and a sense of what stage of danger things were at on a far more local basis, which tends to truncate the timescales involved compared to how long the wider emergency would last nationally and globally. But also because there are probably some differences between how long waves lasted in that pandemic compared to this one, for various reasons I wont bore on about all that much right now. We tried to intervene more this time which affected wave timing, are there are likely some other differences in the epidemic dynamics of the 1918 influenza compared to this coronavirus. Not to mention the issues we've had with new variants already (resulting in merged autumn and winter waves that lasted a long time when combined), and differences in our size of populations and levels of interconnectivity and speed of travel between locations.
www.eastliverpoolhistoricalsociety.org
The Spanish flu infected around 500 million people worldwide
www.liverpoolecho.co.uk