the provision was designed for very vulnerable children, primarily those of women leaving abusive relationships or looking to get their kids out of the home.
Not just in those circumstances -
"What childcare options are there for parents who develop coronavirus symptoms?" ...
"However, if a parent or guardian shows coronavirus symptoms and is unable to adequately take care of the children in their household, self-isolating for seven to 14 days may not seem like a feasible course of action."
"At the government’s daily press conference on 24 March, England’s deputy chief medical officer Dr Jenny Harries spoke of the “exceptional circumstance” of an adult unable to care for a young child during the pandemic."
“A small child clearly is a vulnerable individual, so in this case, although we are encouraging everybody to stay in their own households–that’s the unit with the same risk of exposure–clearly if you have adults who are unable to look after a small child, that is an exceptional circumstance,” Dr Harries said.
www.independent.co.uk/life-style/health-and-families/coronavirus-symptoms-parents-children-childcare-dominic-cummings-a9529481.html