The Government have consistently guided that ventilation is an important part of the measures against covid. We have had a world-leading programme of rolling out CO2 monitors so that we can identify the classrooms that need extra support in this respect. Roughly 3% of classrooms came back as needing the extra support and the Secretary of State confirmed last week that every school that meets the criteria and that has applied for that will get it, paid for by the Department for Education. This is a successful response to ensure that schools have the support that they need.