Full Time Working Nanny

You work full time , you already have a job - so don't need another!!! I always did one day a week but I had retired. Childcare is tiring, so any time you may have is for you to use as you please. Do not feel guilty, too many parents demand too much from GPs . We have had our children,
Sacrificed for them and put our heart and soul into bringing them up. I love my GC dearly but ............ their care is not my responsibility!!!!! Their children their responsibility. Stand firm .

In the nicest possible way: they are not your kids, this is not your responsibility. If you want to spend more time with them, discuss with their parents how you can do some fun stuff with them. If you do not, it’s still nothing to feel guilty about.

You certainly should not feel guilty !
We are retired and love our little one dearly but no way would we offer to have them on a regular basis.
Always there for emergencies and some babysitting. We also enjoy having them for the day or for a sleepover but that is at our convenience.

In my eyes a day a week is quite a lot.
The subject doesnt really arise for me as I live too far away from all my gc[it was them that moved, not me] to see then daily, or even weekly.

But I do see them quite often, as they come to stay with us for several days at a time. And we go and stay at theirs for a few days at a time.

Is that all something you could do?

I can understand parents feeling guilty about having to work and put children into childcare if that was not what they really wanted.

However I do not understand why you would feel guilty, it was not your choice to have the children. The parents make the choices and are responsible for how they live.

What ages are your grandchildren?

If the job is so pressurised why not work from the office, as presumably you did pre-covid, then you know you are not available to look after grandchildren.

Alternatively, could you work 2 longer days from home, leaving one day free for grandchildren?

Firstly stop feeling guilty. You are working in a high pressure job so taking on childcare is too much. You know your limits which is a good thing.
Childcare isn't easy so you need to make it clear that much as you love your grandchildren you are too busy to take that extra job on.

Have you been asked to do this Apple?

Even if you have been, your job clearly doesn't make this doable so there's no reason for you to feel guilty about it. Not all GP's I'm sure look after their GC on a regular basis for one, let alone more days a week even though they're retired.

Not everyone wants to make such a commitment and there's nothing wrong in not doing so.

It's what you do with your GC when you do see and get to spend time with them that matters, not the amount of time.