There is little evidence of coronavirus being transmitted in schools, Education Secretary Gavin Williamson has said.
Mr Williamson said the government was being guided by the best science as it accelerated plans to reopen schools to all pupils in England next month.
Government advisers have warned the nation may have reached the limit of what can be reopened in society safely.
But Mr Williamson suggested an upcoming study would support the government’s position on reopening schools.
His comments came after Prime Minister Boris Johnson said the reopening of schools, after months without in-person education, was the “national priority” of the government.
The prime minister, who is expected to visit a school later, is understood to have made it clear that schools should shut last in any future local lockdowns, after businesses including shops and pubs.
The Association of School and College Leaders has said there is an absence of clear guidance from the government, and schools are making their own contingency plans.
But the education secretary maintained that there was “growing confidence among parents about their children returning” to the classroom.
In a statement issued on Sunday evening, he said: “This is down to the hard work of school staff across the country who are putting in place a range of protective measures to prepare to welcome back all pupils at the start of term.”
Mr Williamson also referred to the “latest research, which is expected to be published later this year – one of the largest studies on the coronavirus in schools in the world”, saying it “makes it clear there is little evidence that the virus is transmitted at school”.
He is believed to be referring to a forthcoming report to be released by Public Health England.
The children’s commissioner for England, Anne Longfield, has called for regular coronavirus testing in schools.
And the National Education Union deputy general secretary Avis Gilmore said: “Robust track, trace and test alongside health and safety checks in schools and colleges are necessary.”
However, schools minister Nick Gibb rejected the idea, telling Times Radio on Sunday that he did not support routine testing for teachers and pupils who did not have symptoms.
Schools across the UK closed on 20 March, except to children of key workers or vulnerable children. On 1 June, they began a limited reopening for early years pupils, Reception, Year 1 and Year 6.
The current plan is for most children across the country to be back in class by next month.
‘Improve test and trace’
Some government scientific advisers are calling for improvements in the test-and-trace system before schools reopen.
One, Prof Sir Jeremy Farrar, the director of the Wellcome Trust, said a “brief window” before schools reopen must be “used wisely”. Writing in the Observer he said: “Most urgently, we need to ramp up testing”.
Meanwhile, Labour is calling for a “rapid reform” of the test and trace system, suggesting local health protection teams are more effective than the national call centres.
Figures released last week by the Department of Health and Social Care showed local teams continued to be more successful than call centre workers when it came to reaching close contacts of people who tested positive for coronavirus.
In a letter to Health Secretary Matt Hancock, shadow health secretary Jonathan Ashworth and shadow cabinet office minister Rachel Reeves raised concerns that the current model is “not fit for purpose”.
On Sunday, the UK reported a further eight people had died after testing positive for coronavirus, taking the total to 46,574. A further 1,062 people tested positive for Covid-19.
In another development, gyms, swimming pools, leisure centres and children’s play centres are being allowed to reopen in Wales on Monday, in a further easing of the lockdown restrictions.
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