At least one patient has died with the Omicron variant of COVID-19, the prime minister has said.

Speaking during a visit to a vaccination clinic near Paddington, in west London, Boris Johnson said: “Sadly yes Omicron is producing hospitalisations and sadly at least one patient has been confirmed to have died with Omicron.

“So I think the idea that this is somehow a milder version of the virus, I think that’s something we need to set on one side and just recognise the sheer pace at which it accelerates through the population. So the best thing we can do is all get our boosters.”

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The confirmation comes after Health Secretary Sajid Javid earlier told Sky News that “about 10” people are currently in hospital in the UK with the new Omicron variant.

On Sunday, the UK reported 1,239 additional confirmed cases of the Omicron variant – the highest daily rise and nearly double the previous high recorded on Saturday.

The total number of cases of the variant now stands at 3,137 in the UK.

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Speaking to broadcasters on Monday morning, the prime minister repeatedly declined to rule out further coronavirus restrictions being introduced ahead of Christmas as the Omicron variant spikes

Addressing the media during a visit to to a vaccination clinic near Paddington, west London, PM said: “Throughout the pandemic I’ve been at great pains to stress to the public that we have to watch where the pandemic is going and we take whatever steps are necessary to protect public health.

“We think the steps that we are taking – so Plan B, combined with a hugely ambitious acceleration of the booster campaign, bringing it forward by a month so we offer a booster to every adult by the end of the year – we think that’s the right approach.”

The prime minister said MPs thinking of rebelling against Plan B measures needed to recognise there was “no room for complacency” in dealing with Omicron ahead of a Commons vote on the new measures on Wednesday.

Mr Johnson added that Omicron now represents about 40% of coronavirus cases in London and “tomorrow it’ll be the majority of the cases” in the capital.

He told broadcasters that, due to this increase in cases, he wants the booster rollout to now “hit warp speed”.

It follows his announcement on Sunday that everyone aged 18 and over in England will have the chance to get their booster vaccine before the end of the year.

Mr Johnson said every adult who had their second vaccine at least three months before will now be able to book a booster jab from Wednesday.

On Monday, he clarified that the aim is to “offer a booster” to every adult by the end of the year.

Earlier, the health secretary told Sky News ministers will “throw everything at” the COVID booster programme to tackle Omicron.

GPs will only focus on urgent needs and vaccinations for the next few weeks.

The NHS website was repeatedly crashing on Monday morning as so many people attempted to book their third doses.

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