The leader of the opposition told Good Morning Britain’s co-host Piers Morgan: “Firstly we’ve got to rally, we have to support the Government. Whatever we think about delay and dithering, we’ve got to support the Government and make these restrictions work.
“That means I must openly support the Government and I will – I have told the Prime Minister that. I will support the messaging of stay at home because it is important we say the same thing as the Government.”
He called for a new British deal of exchanging tough curbs for a fast vaccine roll-out.
Sir Keir told BBC Breakfast: “It’s very important that we get back to what I called the spirit of March last year, which is a very simple message – stay at home.
“Many millions of people complied with that last March, it did allow us to get the virus under control.
“We need to get back to that spirit but I think the British people are entitled to say ‘if that’s what you’re asking us and that’s tough then you really have to roll out the vaccine’.
“We were the first country to get a vaccine, we need to be the first country to have rolled the programme out successfully.”
Sir Keir said the Labour Party had wanted to keep schools open but it became “inevitable” that they needed to close.
He backed calls for furlough to be made available for parents who are unable to work because of school closures and called for political pressure to be brought to bear on tech firms to provide free or subsidised data for children studying at home.
The Cabinet Office minister said he could not give a firm date for when the Government would be able to lift restrictions and that any relaxation would depend on ensuring the most vulnerable were vaccinated.
Mr Johnson said on Monday that he hoped England could “steadily” move out of lockdown – the strictest blanket restrictions imposed since the start of the outbreak in March – from mid-February.