UK experts are set to recommend all 16 and 17-year-olds should be offered a Covid vaccination, the BBC understands.
The Joint Committee on Vaccination and Immunisation stopped short of making the move last month, saying it was still assessing the benefits and risks.
An announcement is expected on Wednesday but it is not clear when the roll-out of the programme will begin.
Jabs are only offered now to those over-12s who have underlying conditions or live with others at high risk.
But some countries, including the US, Canada and France, are routinely vaccinating people aged 12 year olds and over.
Whitehall sources say ministers in England are expected to accept the advice of the JCVI.
It comes after Scotland’s First Minister Nicola Sturgeon said on Tuesday that she was “hoping” to receive updated advice from the JCVI on the vaccination of 16 and 17-year-olds.
Ms Sturgeon said the UK’s four chief medical officers had written to the JCVI, asking them to look again at vaccination advice for young people.
Decisions on vaccinations are based on recommendations from the independent JCVI. Ministers in England, Wales, Scotland and Northern Ireland each then approve the plans.
The only Covid jab currently authorised in the UK for under-18s is the Pfizer-BioNTech vaccine.
In July, the JCVI extended its recommendation on Covid jabs to children aged over 12 who are at higher risk of getting ill and to those on the verge of turning 18. But said it would not extend the roll-out as it examined reports of rare adverse events such as inflammation of heart muscles among young adults.
Speaking ahead of the July decision, England’s chief medical officer Professor Chris Whitty said the JCVI were confident vaccines would protect children to a high degree. But he said more research was taking place as children do not tend to suffer severely from Covid, and the experts wanted to ensure the benefits of the jab outweighed any potential risks.
Shadow health secretary Jonathan Ashworth said: “With the JCVI apparently about to give the green light to vaccinating 16-year-olds, ministers need to ensure plans are in place to roll out this vital next stage of vaccination while ensuring parents have all the facts and information they need.”
A Department of Health and Social Care spokesperson said: “We continue to keep the vaccination of children and young people under review and will be guided by the advice of the independent Joint Committee on Vaccination and Immunisation.”