Tens of thousands of volunteers are invited to join a new phase of a Covid-19 vaccine trial after tens of thousands signed up for the research.
On Thursday, a new phase three study for a vaccine from the US biotech company Novavax started, which is the second phase three study in the UK.
As part of the research, 10,000 people will be invited to participate in the new phase on Friday.
In phase three studies, large numbers of people must test the safety and effectiveness of the potential vaccine in a community.
They will take place across the country, including Greater Manchester, London, Glasgow and Belfast.
The government has secured 60 million doses of the vaccine, which, if successful, will be made in Stockton-on-Tees, Co Durham.
The volunteers had previously signed up for the NHS Covid-19 vaccine research registry, which was set up in July, so that people could express their interest in participating in a clinical trial and be contacted by researchers.
Since then, more than 250,000 people have registered.
Researchers and the government are calling for more people to volunteer for the studies, especially people from Black, Asian, and ethnic backgrounds, people with underlying health conditions, and people over 65.
Economic Secretary Alok Sharma said: “I am incredibly proud of the 250,000 volunteers who have signed up to fight the global coronavirus.
“Our scientists and researchers work day and night to find a vaccine that meets the UK’s strict safety standards. However, we need more people from all backgrounds and ages to sign up for studies to accelerate this life-saving research.
“The more people sign up, the faster we can find a safe and effective vaccine, defeat this virus and save millions of lives.”