Until now, only those over the age of 40, and those in priority groups were eligible – and only if it was six months since their second jab. Details of the timetable for rollout are expected on Tuesday Nov 30.

How long do I have to wait after my second jab to get the booster? 

The new advice says boosters must be a minimum of three months after the second jab. But as the rollout will work down through age groups, most of those being offered boosters in the next few weeks are likely to have waited at least five months 

Where can I get my booster?

Once the NHS has invited you for your vaccine, you should be able to book a slot online at mass vaccination centres, hospitals, pharmacies and some GP practices. Health officials have yet to set out details of the new expanded programme, but say extra hospital sites will be opened, while some sites will be open for extended hours

Which vaccine will I get?

The vast majority of people will be offered Pfizer BionTech or Moderna. A small number of people who are unable to receive this type of jab will be offered AstraZeneca. As with the first and second doses of the Covid-19 vaccine, you won’t be able choose which vaccine you will get so there’s a chance you may receive a different brand of booster. A recent study by Oxford University found that mixing and matching vaccines can induce more immunity than having the same brand of jab.

What level of immunity does the booster give?  

Booster doses have been found to provide 93 per cent protection against severe disease.