The drug and health product regulator has approved the Moderna coronavirus vaccine, the Ministry of Health announced.
Britain had ordered seven million cans of the shock – which is 94 percent effectiveness – and has now ordered another 10 million.
The Moderna vaccine is used across the UK along with Pfizer and Oxford vaccines
A fourth single-dose vaccine is expected to be approved next month.
The Moderna vaccine is the third vaccine to be approved for use in the UK, along with vaccines from Pfizer and AstraZeneca.
The government has ordered 17 million cans of Moderna Jab, but supplies won’t be delivered until the spring.
Health Secretary Matt Hancock said, “This is more great news and another weapon in our arsenal to tame this terrible disease.
“We have already vaccinated nearly 1.5 million people across the UK. With the vaccine from Moderna, we can accelerate our vaccination program even further as soon as doses are available from spring.
“As we immunize those most at risk from Covid, I urge everyone to continue to follow the rules to keep cases low and protect our loved ones.”
Economy Secretary Alok Sharma said he was “pleased” that 17 million doses of the Moderna vaccine had been ordered after it was announced that it had been approved for use in the UK.
He tweeted: “NEW: @Moderna_tx vaccine is approved for use in the UK!
“I am also pleased to confirm that the @beisgovukVaccine Taskforce today received an additional 10 million doses of their vaccine, bringing our total order to 17 million.”
“Another big step towards ending the lockdown and returning to normal life.”
Shadow Health Secretary Jonathan Ashworth said the approval of the Moderna vaccine was “good news”.
He tweeted: “Vaccination is obviously the big national priority now. Given the heavy pressure the NHS is under, the NHS frontline workers are in dire need of vaccination. “