More than 10 million people across Britain have been given their first dose of a Covid-19 vaccine, government figures published on Wednesday show.
The Ministry of Health said 10,021,471 people have had a shot since the start of a mass vaccination campaign in early December. Another 498,962 have had a second dose.
Prime Minister Boris Johnson, who has set a target of vaccinating 15 million of the most vulnerable by mid-February, hailed the "milestone".
"There are many people and groups responsible for the UK's vaccination programme," Mr Johnson said.
He praised those involved in the process, from scientists to delivery drivers to pharmacists, for playing their roles.
"And it is thanks to their effort, the most colossal in the history of our National Health Service, that we have today passed the milestone."
Britain on Wednesday recorded another 1,322 deaths within 28 days of a positive test, taking the overall toll in the outbreak to 109,335.
A further 19,202 positive cases were recorded in the past 24 hours. In all, nearly 3.9 million people have had the disease.
England's Chief Medical Officer, Prof Chris Whitty, said the latest statistics showed this third wave of the pandemic in Britain appeared to have peaked.
"That doesn't mean you could never have another peak but at this point in time, provided people continue to follow the guidelines, we're on a downward slope of cases, of hospitalisations and of deaths," Prof Whitty said.
Britain was the first western nation to approve the use of the Pfizer/BioNTech vaccine outside a clinical trial, and has been administering doses alongside one developed by the University of Oxford and AstraZeneca.
A third, from Moderna, has also been approved and will become available in the coming months.
Regulators are studying trial data from a fourth vaccine, developed by Novavax.
Mr Johnson, who has been criticised for his handling of the pandemic, is pinning his hopes for easing a third national lockdown on a successful vaccine campaign.
He is planning to detail his plans for lifting restrictions in England on February 22, with the week of March 8 set aside for schools to begin to reopen.
