The blood test determines, via the presence of antibodies, whether a person has already had COVID-19.
Celebrations for St George's Day are low key in a normal year. They are inevitably even quieter during a coronavirus lockdown.
Britain's diplomatic mission in Brussels sent an employee out early on Saturday to change the building's nameplate to read "UK Mission to the European Union", signalling its new non-member status.
Hillsborough football disaster police chief found not guilty
Severe flood warnings have been issued in England as flooding continues to force people from their homes
Two second-half tries saw South Africa accelerate away from England to win the Rugby World Cup in Japan.
England players fanned out across the pitch as the All Blacks delivered the traditional challenge, but rules say they must not cross the halfway line.
New Zealand will face England in next Saturday's Rugby World Cup semi-finals after the All Blacks pummelled a flat Ireland 46-14 in Saturday's last-eight clash in Tokyo.
Fourteen of those detained were foreigners, police said, adding that the arrest could not be made "without the use of coercive means."
Of the three matches scheduled to take place on Saturday, only one — Ireland vs Samoa — will go on as planned while England's match against France and the clash between New Zealand and Italy have been cancelled.
Landmark Didcot cooling towers destroyed in controlled explosion