COVID-19 booster vaccines will be offered across the UK starting next week.
Health Secretary Sajid Javid said he accepted advice from the Joint Committee on Vaccination and Immunisation (JCVI) that about 30 million people should be offered a third dose.
Scotland, Wales and Northern Ireland have followed suit.
Mr. Javid made the announcement in the House of Commons as part of an autumn and winter plan for managing the pandemic in England.
He said the JCVI recommended that people who were vaccinated as part of priority groups in phase one of the UK's inoculation programme should be offered the booster vaccine no earlier than six months after the completion of the prior vaccine course.
Those eligible include people aged 50 and older, younger adults with health conditions and frontline health care workers.
The UK Government will also begin offering one dose of the Pfizer vaccine to children aged 12 to 15.