Thank you, Minister, and I very much welcome the action that you took before Christmas to take us into alert level 4, and I also wanted to pay my heartfelt thanks to our NHS and social care staff, who are dealing with an unprecedented public health emergency. You referred in your earlier comments to the importance of keeping children and young people in school, which I entirely concur with, but, as you'll be aware, the evidence about a new variant emerging has caused a lot of anxiety, both for families and for school staff. Can you say a bit more about how the technical advice cell paper you've commissioned on the transmissibility of the new virus will look specifically at the role children play in transmission so that we can try and reassure everyone that the return to school will be safe?

Can I also ask about shielding? I was pleased to see the advice issued just before Christmas on shielding, but that advice did relate, obviously, solely to people who are shielded and not their families. I think it would be useful to have some further advice for families, particularly in view of the concerns about the higher levels of infectivity of this new variant, and can I ask if you'll discuss that with the chief medical officer, with a view to issuing further guidance for family members and carers of those who are shielded? Thank you.