The latest government guidance is based upon the most recent scientific advice on how to further limit the spread of COVID-19 is clear. This advice states that if children can stay safely at home, they should do so, to limit the chance of the virus spreading.
Whilst they have asked schools to remain open to provide care for a limited number of children (children who are vulnerable and children whose parents are key workers critical to the Covid-19 response) this is only in the case that these children cannot remain safely at home.
Therefore, as many parents/carers of these children may be able to ensure their child is kept at home safely they should do so. Provision in school is the last resort.