The UK has ordered 35 million extra doses of the Pfizer-BioNTech vaccine which is to be delivered in the second half of 2022.
The government said the act is in preparation for a programme of Covid boosters which is aimed at protecting the most vulnerable.
The UK has ordered more than 540 million doses of eight different Covid vaccines of which four have been approved for use in the UK.
UK Health and Social Care Secretary, Sajid Javid said the order was intended “to future-proof our vaccine programme”.
The NHS got the sign to start making plans for a third booster doses for the over-50s, after advice came from the Joint Committee on Vaccination and Immunisation (JCVI) in early July and Javid has recently noted that the programme would start in September.