The UK has signed a deal with Pfizer/BioNTech that will see 35 million doses of its COVID-19 vaccine delivered in the second half of 2022.
The contract is part of the UK government Vaccine Taskforce's plan to protect the country from potential future COVID-19 outbreaks and variants.
This could include the possibility of booster programmes in the future, where already vaccinated people are given a further dose.
Any potential booster programme will be based on the final advice of the Joint Committee on Vaccination and Immunisation, which is expected next month.
The Pfizer vaccine has been given to millions of people in the UK already, alongside the AstraZeneca and Moderna jabs.
The UK will also be donating 100 million vaccine doses within the next year, with the first batch of nine million doses announced last month.
The UK is also one of the largest donors to the COVAX facility and has committed £548 million in UK aid to help distribute 1.3 billion doses to 92 developing countries this year.
Data from Public Health England and Cambridge University has found that the COVID-19 vaccines have saved 925,000 lives, while preventing 82,100 hospitalisation and 23.9 million infections in England alone.
Health and Social Care Secretary Sajid Javid said: "The UK’s phenomenal vaccination programme is providing tens of millions of people with protection from COVID-19, saving 95,200 lives and preventing 82,100 hospitalisations in the over 65s in England alone.
"While we continue to build this wall of defence from COVID-19, it’s also vital we do everything we can to protect the country for the future too – whether that’s from the virus as we know it or new variants.
"I am pleased we’ve reached this agreement with Pfizer for more doses as part of our robust preparations to future-proof our vaccine programme, ensuring we have plans in place to keep the nation safe for years to come."
