Downing Street leaned on Public Health England not to publish crucial data on the spread of the new Covid variant in schools, documents seen by the Observer have suggested. Scientists, union officials and teachers said that the lack of transparency was “deeply worrying”.

The focus of their anger concerns the pre-print of a PHE report that included a page of data on the spread of the India Covid-19 variant in schools. But when the report was published on Thursday 13 May, the page had been removed. It was the only one that had been removed from the pre-print. Days later, the government went ahead with its decision to remove the mandate on face coverings in English schools.