#Accelerationism The Novavax jab is the first to show in trials that it is effective against the new virus variant found in the UK, the BBC's medical editor Fergus Walsh said.
The UK has secured 60 million doses of the jab, which will be made in Stockton-on-Tees in north-east England.
Meanwhile, a single-dose vaccine developed by Janssen is 66% effective, trial results have shown.
Janssen, a company owned by Johnson & Johnson, is also investigating whether giving two doses will give either stronger or longer-lasting protection.
The company said its initial findings showed one dose prevented 85% of severe cases.
Both the Novavax and Janssen jabs will need to be reviewed by regulators before they can be used.