Does it mean sole-carer (as in, the au pair will care for children on her own without a parent around) or that the there is only one child or family to be cared for. I seem to see adds using it in different ways so difficult to decipher. Sorry if this is a silly question
I agree, it's about the amount of time the carer will be spending with the children on their own - no parents around. Sole Charge would mean that the carer is responsible for the children the vast majority of the time.