The Department for Education said that the return would involve: "Protective measures across education strengthened, with students in Year 7 and above to wear face coverings indoors, including classrooms, where social distancing cannot be maintained."
Staff in secondary schools and colleges are also "being advised to wear face coverings in all areas, including classrooms, where social distancing cannot be maintained, as a temporary extra measure".
The DfE said the rule on the use of face coverings in classrooms would be in place until Easter, and "as with all measures, the government will keep it under review".
Is it possible that the slight confusion with wording is because they have made it compulsory for children but advised for teachers? That is how I am reading this