Current Government guidance on face coverings for schools states:
Where pupils and students in Year 7 and above (and their equivalents) are educated, we recommend that face coverings should be worn by staff, pupils and students when moving around the premises, outside of classrooms, such as in corridors and communal areas where social distancing cannot easily be maintained. Face coverings do not need to be worn by pupils and students when outdoors on the premises.
In addition, we now also recommend that in those settings where pupils and students in year 7 and above (and their equivalents) are educated, face coverings should be worn in classrooms, in other learning environments such as workshops, and during activities unless social distancing can be maintained. This does not apply in situations where wearing a face covering would impact on the ability to take part in exercise or strenuous activity, for example in PE lessons.
In primary schools, we recommend that face coverings should be worn by staff and adult visitors in situations where social distancing between adults is not possible.