Help Needed but How?

They could pay for a cleaner and the children could attend breakfast and after school clubs.

If they want help in-house, your daughter could go through an agency that supplies vetted staff.

Here is a link to the trade association for au pairs.
bapaa.org.uk/.

If your daughter and SiL have such high powered, high flying careers, how come they are unable to find out for themselves how to get suitable domestic staff?

Do they both need to be working? Shorten hours perhaps? It’s for them to sort out. They made these choices.

Don’t over do it yourself. You’ve had your time.

Do they have room for an au-pair? Depending on where they live, they might find someone from abroad who could live in and maybe attend language classes during the day.

The phantomfinger MissA ?

Now where did those extra letters come from?

It sounds as if a nanny is what's needed.
Qq

There are breakfast and after school clubs after school to help for working parents. As you say they have " high flying careers " then they can afford to pay for a cleaner. There are school holiday activities which although invoke a cost are good for parents and children.
Please be careful with your own health. It is not essential that you plug all the gaps,parents need to organise themselves and take the responsibility for their children.

Trouble is, that’s the sort of job that doesn’t pay very well because it’s few hours in total. But it disrupts the day for anything else.

Probably only a stay-at-home mum who needs some extra income would consider it.