I understand that they won't be as compliant all the time (especially when eating lunch), but surely some mask-wearing is better than none?
Government guidance advises that on the basis of current evidence, in light of the mitigating measures education settings are taking to reduce the risk of COVID-19, and their potential negative impact on communication, face coverings will not generally be necessary in the classroom even where social distancing is not possible. The government advises that face coverings can have a negative impact on learning and teaching and so their use in the classroom should be avoided. However, government guidance is that currently, in schools where pupils in year 7 and above are educated, face coverings should be worn by adults (staff and visitors) and pupils when moving around indoors in corridors and other communal areas where social distancing is difficult to maintain. In primary schools, in situations indoors where social distancing between adults in settings is not possible, settings have the discretion to recommend the use of face coverings for adults when indoors on site.