I want to return to the question of masks. As we have already heard, the ending of the mandatory wearing of masks is causing anxiety and insecurity among clinically vulnerable people. Would the Minister agree that, given that the wearing of masks reduces the spread of the virus and causes no harm to the economy, it would be sensible to make it mandatory? Secondly, guidance recommends good ventilation in enclosed spaces. What assistance are the Government giving to those who need to install air filtration systems?