Boris Johnson has revealed "at least 400 military personnel" will assist healthcare staff and volunteers in the COVID booster vaccination rollout.
It comes as positive cases of a new Omicron variant continue to appear in Britain, and follows military involvement in previous vaccination efforts.
Speaking at a Downing Street news conference, the Prime Minister gave details on the deployment as part of a wider booster programme, which includes more than 1,500 community pharmacy sites across England.
He added: "There'll be temporary vaccination centres popping up like Christmas trees and we'll deploy at least 400 military personnel to assist the efforts of our NHS alongside, of course, the fantastic jabs army of volunteers."
Earlier in the day, the Prime Minister had hinted at Army involvement during a visit to a North London GP surgery, saying the Government had "no doubt at all that the NHS, all the volunteers, the Army, everybody can rise to the challenge".
"Is it going to be hard work? Yes, it is. But I know that people can do it," he added.