On bank holiday Monday, the Minister for education announced a budget of over £3 million for the provision of 1,800 ozone disinfectant machines in our schools, colleges and universities. Two days later, following calls for assurances on the safety of the equipment from Plaid Cymru and others, it became apparent that Ministers had carried out a u-turn on that decision. Can you explain the process that led to that contentious decision to procure and use those machines, and what was behind the decision not to purchase those? Now, would you agree with me that the Government should conduct a review of the process of making these decisions on ozone equipment, and will the Government now provide a focus on ventilation, including providing air-filtration machines used a great deal in other nations?