I won’t post the website for the company I used to work for since that would give away my precise location but I’ll post the website they advertised on.
Www.childcare.co.uk :) - you do have to pay to interact on the website BUT often companies will post contact details which you can view for free.
Also, another idea I had was childminders - often they work any hours they’re needed because the majority of them are self employed. For example, when i was one before I moved into nurseries etc I used to work until 11pm sometimes if I had to because of not getting a conventional wage