At the outset I want to be very clear that we have followed public health advice and guidance in our schools. It is the expert view of public health officials that our schools are places of low transmission, largely because of the very significant and substantial infection prevention and control measures that are in place in schools. Specifically on the points made by the Deputy on CO2 monitors, these were suggested and are available in our schools. Equally, in terms of ventilation we have been very clear at every …