I have just been reading the EYFS regarding a different matter and I can't find any reference to continuity of care and I'm concerned !!

Occasionally I am over my 3 EY children for 2 hours because an existing mindee changed his hours to start earlier than originally agreed after he had started and was settled. I risk assessed it, got parents permission etc and as far as I was aware this was then fine but where in writing is this I back it up?!