Thousands of the devices, which deliver oxygen to the lungs without needing a ventilator, could be made.
The UK faces reviews of measures every three weeks for six months or more, says deputy chief medical officer.
There are many unanswered questions about the new coronavirus, Covid-19.
Measures to target coronavirus may get tougher, Boris Johnson says in letter sent to every UK home.
It comes as the number of people who have died with the virus in the UK rose by 260 to 1,019 on Saturday.
NHS England's medical director says "every one of us has a part to play" to keep the death toll down.
Comparing the UK’s epidemic to other countries after Friday saw the biggest rise in deaths so far.
Palliative care experts urge people to have the "difficult conversations" before it's too late.
Prepare for coronavirus like you would prepare for surgery, experts advise.
The health secretary also has the virus, England's chief medical officer has symptoms, and the number of UK deaths jumps to 759.
Hundreds of tests are to take place in England this weekend and be scaled up next week.
Dr John Wright explains how Bradford Royal Infirmary is preparing for a "tsunami" of Covid-19 cases.
Pictures show people across the UK stepping outside to pay tribute to the work of the NHS in the coronavirus crisis
If coronavirus can be transferred on to surfaces, safe food shopping presents challenges.
The government aims to reach 25,000 tests a day, with patients and NHS workers the top priority.
An 18-year-old has died of coronavirus in England. Are young people at risk from the virus?
Can I travel somewhere to exercise, are loss of taste and smell symptoms, and other questions answered.
The huge challenge the world faces to find an exit strategy to end the lockdowns and return to normal.
People most at risk of needing hospital treatment if they get coronavirus are being asked to stay home.
The virus is spreading around the world, but what is it and what are the symptoms?
Older people and those with pre-existing medical conditions are more vulnerable to the virus.
Everybody should be avoiding non-essential contact, and you should stay at home wherever possible.
We answer some of the big questions about vaccines and how long one for coronavirus could take.
How do we keep fit while heeding the government's new advice on avoiding unnecessary social contact?
The UK government's chief medical adviser has become the public face of the coronavirus response.
What is it like to have the coronavirus, how will it affect you and how is it treated?
Advice on protecting your mental health during the coronavirus outbreak.
More cases are now reported every day in Europe than in China at its peak, the WHO says.
Fifteen British people were working in a school in Jeju, now deserted amid coronavirus precautions.
Boris Johnson's chief scientific adviser says the UK is four weeks behind Italy, What does that mean?
With face masks in high demand, we look at whether they really can protect people from the virus.
What measures are being taken and what advice is there for looking after older and elderly people?
Key graphics explaining how coronavirus has spread in the UK and the government's response.
A 17-year-old volunteer who set up a group in London said: "It's only right that we help out."
The BBC Health team talks through the NHS advice about protecting yourself from COVID-19.
The BBC's Fergus Walsh and expert Sian Griffiths answer your questions about the virus outbreak.
The current best guess of a 1% death rate does not apply to everyone.
Keep the message calm, understandable and try not to overemphasise the risks, experts suggest.
As schools close their doors across the UK, we look at what will happen next.
From animals to humans, how did the deadly coronavirus make the leap? We look at the scientific evidence.
Health officials are trying to contain the virus after a cluster of cases on the south coast. Can the virus be kept at bay?
The World Health Organization says coronavirus "can be characterised as a pandemic". What does that mean?
Key charts explaining how the respiratory virus has spread and how it is being dealt with.
Concerns are being raised about the accuracy of the tests for the coronavirus.
The deputy Chief Medical Officer for England says social distancing measures will likely be in place in some form for six months.
There's huge anxiety in the NHS over coronavirus and the lack of protective equipment, Dr Guddi Singh says.
The cabinet minister says that the UK has not been disadvantaged by the government's decision not to join.
NHS England's medical director urges people to continue government advice to beat Covid-19.
Cabinet Office Minister Michael Gove said there would be increased antigen testing for frontline workers.