To not know how on earth I can go back to work?

You could ask the local estate agents if they want anyone for weekend working. My son did this for a while. He just answered the phone and other admin or showed people round the houses. he also filled in sometimes when staff were ill.

Why don’t you work on your mental health if possible and try to increase your resilience so that you have more options?

All the civil servants I know (including DH) have to do 40/60% split of home and office. This includes people on term time

You mentioned your family lives close by, can they not help with childcare?! If they can’t then
I think your best bet is improving your qualifications so that when you go back to work, you earn more. Unfortunately in this country the cost of childcare is insane and unless you earn enough sometimes it is pointless working except to keep yourself occupied intellectually and ensure your cv doesn’t have a gap.

How do people do it

I waited until the kids were older. We lived frugally for many years. At the beginning of working FT, my childcare day rate (for 3) costed more than my day rate for work during school holidays but I kept going for a while eventually got promotions + more money.

8 years on, all my earning going into uni fund!

Maybe work on your anxiety so that you can spread your wings and do a 'normal' job

If you're only working 2hrs/day are you able to study/train during the day?

What extra qualifications would you need in order to be able to apply for an admin role in a school for example? Some admin roles at the council can be term time only (round here at least. Although I'm not sure how many people are actually given this)

What about a part-time WFH job that's maybe only 15 hrs/week, and you might have to do some of it in the evenings during school holidays (but maybe you could get some hours in over the weekend?)

Working 10 hours a week is not 'working around school time'.

You could be a cleaner and work school hours. Or ask your local school if they are any vacancies for dinner ladies. Or take in ironing as a last resort.

If you don’t mind a public facing job but want a desk job, would you consider working for a call centre? A lot of jobs are often remote these days and sometimes they include evening work depending on the role.

Any civil service jobs in ur area or that offer work from home? U can ask for term time working only. Some civil service jobs offer evening work hours too.

I work part time in one job and also work as a clerk/governance professional. It’s not huge amounts of money but an additional £500 or so a month I mainly do it in the evening. I have a contract for 8 hours a week. PM if you would like more info

If you are working more hours won’t you then be entitled to help with childcare via Universal Credit?

Potentially lots of evening work that isn't bar work.

Pubs/restaurants have kitchen staff/pot wash.
Call centers
Theatres
Leisure centers
Cinema
Bowling alleys
Shops
Pharmacy
Warehouse
Factories
Cleaning of offices/other workplaces

Are there any training or study opportunities that aren't too expensive? Local college? Part time or evening options? Get some qualifications, stretch your brain and expand your employability?

wfh is great, really helps out families in my opinion. But you still need actual childcare! Especially for little ones! It’s not actually possible to work and look after tinies

I think in your boat OP if you don’t want to childminding or night working I’d look for another school job, TA, office staff or dinner lady etc? At least those are school hours only

May have been suggested, but what about evenings/weekends. supermarkets, pubs, restaurants. I have a friend who works in Mc Donald’s they are really flexible.
Cleaning, I am a nurse and earn less than my friend who is a cleaner, same for my friend who is a private carer.

Unfortunately when kids are young then childcare is expensive and does take up a large chunk of wages. You just power through it best you can. Did you try anything to make life easier with your WFH job, part time child care, flexi hours? Yes you absolutely can take time off for sick kids. It's called parental leave. It's not an excuse. It's just fact. "Little Jonny has D&V sorry I have to take annual leave/unpaid leave to deal with it. See you Thursday." You made life far harder than needed to be. Replacing you cost your employers money. I would rather allow some adjustments for a good employee than let them burn out/leave. Did you try talking to them before you quit?
Shame you gave the WFH job up as it gets easier once they are older and you then still advance your career.

@SoftAsShit what happened with the children when you had your WFH job? Surely they still had nursery/school and you had to pay for childcare for the school holidays?

How far away is the nearest big supermarket? Surely there must be one somewhere? Like others suggested stacking shelves at night is pretty solitary so perhaps less anxiety inducing that being in a front role.

@SoftAsShit Maybe it would be more productive for you tell us what you are willing to do 🤷‍♀️

So far you’ve been silent on most suggestions.

Would you consider tutoring or teaching English online? Big demand for this and don't always need qualifications.

Unfortunately, until your kids are older and childcare is cheaper, you may have to accept you will not earn much more than childcare costs. This is sadly the reality for many parents (usually Mums). As others have pointed out, with working, you get annual leave, sick leave, pension etc, plus experience usually leads to a salary increase with time.

It's unfortunate that you left you WFH job. I've been doing mine for years, with sick kids in the picture and term time holidays, too. You just send them to childminder or affordable church nursery part-time, they have lunch there, come home and nap for 2-3 hours, so you can finish your work, and then you finish in the evening when they go to bed (I've been a contractor but with somewhat flexible deadlines). Yes, it's stressful, but you suck it up if you really need the money. It won't be forever. My youngest has started school now and it's not that stressful anymore. I also live rurally, and if I lost my current job I could probably try to get a job in a local bakery, starting at 4am. DH would take them to school in the morning, I would have a nap after coming home and then pick them up. I've known couples who worked night shifts/days shifts in such situations, to save on childcare - they swapped for several years till school started. That's life, it's hard, but you need to persevere :).

How about doing a cleaning job. You would be able to pick your hours.