You appear to be having issues with your childcare arrangments? Is this the same nursery that charge for bank holidays?
No, you as parents have no rights to information as to why the nursery is closed just because your child attends the setting. If it was something involving your child would you want all and sundry knowing? I doubt it, so you must respect what may be another parents privacy.
Quite apart from as bednobs says, gossip mongering and hear say, whatever the issue here, will be investigated fully by OFSTED (and it must be something of signifigance to be investigated by then)