People who are aged 50 and over can now book a coronavirus vaccine online.
From this morning the NHS website allows people over 50 to book their jab.
There has been a surge in supply of the vaccine, which means that half of all adults could have received their vaccine by the end of the week.
The government is aiming to give all over-50s and everyone with underlying health conditions at least one vaccine dose by April 15.
Last week in England people aged 55-59 were invited to get their inoculation, but this has now been widened to all those over 50.
As of the end of Monday March 15, the number of people in the UK to have been given a first dose of a Covid-19 vaccine is 24,839,906 - an increase of 386,685 compared to the previous day.
That means that 37.2% of the population have received at least one dose of the vaccine.
Speaking on Monday, Professor Anthony Harnden, deputy chairman of the Joint Committee on Vaccination and Immunisation, said that all over-50s will be vaccinated within the next few weeks.
He told BBC Breakfast: “In primary care, we’re still vaccinating cohort six – all with underlying illness – and some of seven.
“But, throughout the country, we’re going down to cohort nine.
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“Most people over the age of 50 will be vaccinated really within the next few weeks – so it is tremendously successful.
“Those first nine priority groups included 99% of all hospitalisations and deaths, certainly in wave one of the pandemic, so we’re feeling very optimistic.
“We’re seeing a very sharp reduction in the deaths and hospitalisations throughout the country.”
