A total of 30,209,707 people received the two doses of a coronavirus vaccine (57.4% of the adult population).
And 41,831,056 received a first jab (79.4%).
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It comes as the UK has reported over 7,000 a day COVID case for a seventh consecutive day.
A further 7,673 infections were recorded in the last 24-hour period, along with 10 other coronavirus-related deaths.
The figures are to be compared with 7,742 infections and three deaths announced on Monday, while 6,048 cases and 13 deaths were recorded at this time last week.
NHS England has now extended the offer of a vaccine to anyone over the age of 23.
And all over 18 in England will be able to reserve a first dose by the end of this week, Downing Street confirmed.
Meanwhile, members of the public who have already had their first jab are being urged to come forward for their second dose to help protect against the threat of new variants of COVID.
To ensure the strongest possible protection for people, second doses for those over 40 will be accelerated by reducing the dosing interval from 12 weeks to eight weeks.
30 million second doses have now been administered across the UK 🇬🇧
The second doses are extremely important to achieve full protection.
The vaccine is our way out of this pandemic, so when it’s your turn, go ahead and get both vaccines. pic.twitter.com/URcAJEkTDM
– Matt Hancock (@MattHancock) June 15, 2021
Anyone over 40 who received a first dose in mid-May will be offered a second dose by July 19.
In addition, a new analysis from Public Health England (PHE) has shown for the first time that two doses of a COVID vaccine are very effective against hospitalization of the Delta variant, first detected in India.
Data suggests that the Pfizer-BioNTech vaccine is 96% effective and the Oxford-AstraZeneca vaccine is 92% effective against hospitalization after both doses.
Health Secretary Matt Hancock said: “The second doses are increasingly vital, so this is an extremely important step. Day after day, our immunization program reaches new heights.
“With over 30 million people across the UK now receiving a second dose, we are providing the most comprehensive protection possible for our loved ones from the new variants.
“The strength of unity has never been clearer than in the UK vaccination effort. All corners of this country have come together for a common goal – to get the vaccine and fight this virus.
“I want to pay tribute to everyone across the country who answered our call to arms and rolled up their sleeves to get the jab. I encourage everyone over 23 to come forward and get the jab. “
Those over 18 in Wales and Northern Ireland can already get a jab, and those over 30 are eligible in Scotland.
Prime Minister Boris Johnson on Monday announced a postponement of the fourth stage of England’s roadmap on COVID-19 measures, pushing back the hoped-for “Freedom Day” from June 21 to July 19 amid increasing cases of the Delta variant.
Cabinet Minister Michael Gove told Sky News that July 19 was the ‘end date’ for the remaining coronavirus restrictions in England and it would take an “unprecedented and remarkable” change of circumstances to derail this.
Too, Scotland ‘likely’ to maintain COVID restrictions for three more weeks from June 28, said the country’s Prime Minister, Nicola Sturgeon.
Speaking to Holyrood, Ms Sturgeon did not rule out further easing of restrictions, but said the Scottish government had to ‘buy themselves enough time’ to allow the vaccination program to continue its work.
A three-week delay would allow more people to receive a second coronavirus vaccine amid concerns about the increase in cases of the Delta variant, the premier added.