More than 20 million people in the UK have now had their first dose of the coronavirus vaccine, Health Secretary Matt Hancock has said.
He said it was “a magnificent achievement for the country” and “the vaccine is our route out”.
The government is aiming to offer all adults a first dose by the end of July.
From Monday, nearly two million people aged 60 to 63 in England will start receiving letters inviting them to book their vaccine.
The government’s next target is to offer a first dose to all over-50s by 15 April, as well as people aged 16-64 with certain underlying health conditions and unpaid carers for disabled and elderly people.
After that, they will start offering jabs to people by age group.
There are no plans yet to vaccinate children, although trials have been announced to test the Oxford University jab on children.