Looking ahead, If I do have to close or are forced to close, my contract means parents are not obliged to pay. That said, I know most of my parents will continue to be paid and if I am more than three or four weeks without income, I'll be forced to find another job or source of income.
Can anyone think of a not too cheeky but to the point way of saying if you still want a childminder at the end of this please, keep paying me if you can afford to! Even half fees would be a help but I do t feel I can be too prescriptive 
Does anyone have any thoughts on this approach?