OP we live near each other.
i promise you there are great nurseries around here that don’t cost what yours is charging. Mine have been to them.
unless DC is in Highgate pre-prep or similar.
I can PM you some to look at if you want.
i think your areas to consider are:
first
your childcare choices. You are currently spending £10-20k A YEAR on some luxury choices - a pricey nursery and having your nanny on call.
you could spend a lot on emergency childcare before you get to £20k a year.
if you believe your choices are worth it, that’s fine, but you have to own that this is where your disposable income is going
second
your job. I wondered if you are a doctor which is the only job I can think of where you HAVE to be onsite to work.
as you work in head office, what happened during the pandemic? Surely everyone worked from home?
it’s retail, you are not saving lives. They are obliged to consider flexible working requests.
i work for a big corporate and 2 days a week from home is now standard.
the difference working from home would make is you and your DH could take it in turns to do the school / nursery run, and you could change your nanny for 20 hours a week afternoons and holidays nanny.
and save £15-20k a year of disposable income! That is A LOT
again in this area there are plenty of Nannies looking for that - we have one and so do several families I know.