One other thing to maybe consider which I only just (stupidly) realised is that taking a lover paid job to enjoy time with family has meant I'm not paying NI towards a state pension
If you're receiving CB for a child under 12, you do get NI credits towards a state pension. Plus you can get credits by working fairly part time, something like 16 hours a week.
@Ideasplease322 there's a huge difference, in pay and hours between directors/deputies and office jobs or even professions in the civil service. Yes, high level people will work long hours, especially if they're in a department affected by COVID, Brexit or any other major issues, but you can get the flexible hours/reasonable workload most of the time at lower levels.
OP, how doable this is depends a lot on your expectations and whether or not you are able to earn at a decent rate when you need to by freelancing doing something you enjoy.
Or have reliable seasonal work so you have periods where you work long hours, but you only did it a few months of the year. Because as others have said, if you need an income but can only get it by doing NMW work like retail or care work, you really have to put the hours in to get a meaningful income. But if you can do a bit of lucrative web design (for example) work every once in a while, it could suit you a lot more.
On the expectations front, what people spend on 'variable essentials' varies enormously. Some people will be happy with a £50 pw from Aldi food budget, others would see anything other than being able to spend what they like in Waitrose averaging £200 pw as an unacceptable compromise.
Holidays - would you still want to afford holidays and would you want nice ones that cost thousands, or would you be happy with a few days camping?
Do you want the latest gadgets etc and all the data on your latest iphone, or are you happy with a cheaper Android and a fiver a month on a sim only contract?
Definitely look up FIRE. There's a lot of guidance on how much you need and how to afford it, whether from a passive income, use of savings, or earning money but not necessarily from a conventional job.