Schools in England will not be able to reopen to all pupils after the February half-term, but could do so from 8 March, the prime minister has said.
Boris Johnson said this was the earliest schools could reopen and "depends on lots of things going right".
The BBC has been told the aim is for all schools and year groups in England to return at the same time. Their return would mark the first stage in lifting the lockdown, the PM said.He told a Downing Street news conference: "The date of 8 March is the earliest that we think it is sensible to set for schools to go back and obviously we hope that all schools will go back."
"I'm hopeful, but that's the earliest that we can do it and it depends on lots of things going right, and... it also depends on us all now continuing to work together to drive down the incidence of the disease through the basic methods we've used throughout this pandemic," he added.