Should children in England wear face masks in schools?

Case for and against pupils wearing a face covering as England prepares to reopen schools

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Hours after the Scottish government gave secondary schools obligatory" guidance that pupils should wear face coverings in corridors, communal areas and school buses, Boris Johnson appeared to at least partially give into calls from teachers and parents on face masks, mandating their use in secondary schools situated in areas of England subject to tighter coronavirus restrictions.

He also gave other parts of England the discretion to make their own rules, dropping guidance against using face coverings. But what are the arguments for and against making them compulsory across all English secondary schools?