Health officials in Britain say more than three-quarters of adults in the United Kingdom have received both doses of a coronavirus vaccine, a milestone that Prime Minister Boris Johnson described as a huge national achievement.

The latest figures from the Department of Health and Social Care showed that 39.7 million people have now been double-jabbed. More than 47m, or 89 per cent of the adult population, have received a first dose.

Health Secretary Sajid Javid said that the vaccine rollout has created a wall of defence that has massively reduced hospitalisations and deaths from Covid-19.

Javid also said that officials are preparing to offer coronavirus booster jabs from early September to the most vulnerable groups, according to an AP report.