Facemasks will no longer be required in the classroom from Thursday, despite protests from teachers’ unions. 

The move, announced by the Prime Minister on Wednesday, comes alongside the immediate lifting of guidance advising people to work from home if possible.

And Boris Johnson said the legal requirement for people with Covid-19 to self-isolate is set to be axed by March 24 – and earlier if possible.

He said that in future, the virus would be treated like flu.

It comes after Covid-19 infection levels fell in three of the four UK nations for the first time since early December, according to the Office for National Statistics (ONS).

Mr Johnson said this data showed that while there were some places where cases were likely to continue rising, including in primary schools, “our scientists believe it is likely that the omicron wave has now peaked nationally”.

Face coverings will not be required for teachers or pupils in classrooms from Thursday, and no longer needed in communal areas from next Thursday, when the Plan B rules expire. 

Union leaders reacted with anger on Wednesday, accusing the Prime Minister of flouting his “duty of care” to teachers.

The UK’s largest teacher union warned last night against lifting restrictions “too quickly” saying that this could lead to “more disruption” for schools.

Dr Mary Bousted, joint general secretary of the National Education Union, said: “Rather than announcements aimed at saving Boris Johnson’s job, [the] Government should be exercising a duty of care to the nation’s pupils and the staff who educate them.”

She acknowledged that Covid-19 cases in secondary schools had fallen but said it was “uncertain” that this trend would continue since children had only been back in the classroom a few weeks following the Christmas break.

However, recent polling by parent voice charity Parentkind found that almost two thirds of parents of secondary school children are not in favour of face masks in the classroom.

Nadhim Zahawi, the Education Secretary, said: “Face-to-face education for all students has consistently been my priority, and that is why I am removing face coverings from classrooms – as promised – on the earliest possible date, making sure there is as little disruption to students’ learning as possible.”

Business leaders expressed relief about the end of guidance advising people to work from home, with hopes that the change – which takes immediate effect – could spur economic recovery. 

The Prime Minister said the moves over the next week, which will also see the end to mandatory Covid-19 passes, will return the country to Plan A.

Plans to bring Britain closer to normality by spring

But he signalled an intention to go further, and bring Britain closer to normality by spring.

He told the Commons: “There will soon come a time when we can remove the legal requirement to self-isolate altogether, just as we don’t place legal obligations on people to isolate if they have flu.

“The self-isolation regulations expire on March 24, at which point I very much expect not to renew them. Indeed, were the data to allow, I’d like to seek a vote in this House to bring that date forward.”

The Prime Minister promised a “long-term strategy for living with Covid-19” which would “protect our liberty and avoid restrictions in future by relying instead on medical advances”.

On the use of face coverings, Mr Johnson said: “In the country at large, we will continue to suggest the use of face coverings in enclosed or crowded spaces, particularly when you come into contact with people you don’t normally meet, but we will trust the judgment of the British people and no longer criminalise anyone who chooses not to wear one.”

On Wednesday night, Sajid Javid, the Health Secretary, said Britain had reached a moment “we can all be proud of”, adding: “I’d always said that we’d open up the country as soon as the data supports it.”