Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

An almost empty check-in area is seen at Gatwick Airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

An almost empty check-in area is seen at Gatwick Airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A passenger sits in an almost empty check-in area at Gatwick Airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

Passengers are seen in an almost empty check-in area at Gatwick Airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A passenger sits in an almost empty check-in area at Gatwick Airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A passenger stands in an almost empty check-in area at Gatwick Airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

Michela takes part in a socially distanced one on one training session with trainer Dec (not pictured) in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec (not pictured) in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec (not pictured) in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

A person walks past a TopShop, as the spread of the coronavirus disease (COVID-19) continues, in York, Britain, November 27, 2020. REUTERS/Lee Smith

A woman walks past a TopShop, as the spread of the coronavirus disease (COVID-19) continues, in York, Britain, November 27, 2020. REUTERS/Lee Smith

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

A signage is seen outside an Outfit clothing store in Liverpool, Britain, November 27, 2020. REUTERS/Phil Noble

A signage is seen outside an Outfit clothing store in Liverpool, Britain, November 27, 2020. REUTERS/Phil Noble

Stephen Cottrell, Most Reverend Archbishop of York, poses for a photograph under the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Stephen Cottrell, Most Reverend Archbishop of York, takes a photograph of the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Manequins are seen in the window of a Topshop store in Liverpool, Britain, November 27, 2020. REUTERS/Phil Noble

People wearing face masks walk past a Topshop store in Liverpool, Britain, November 27, 2020. REUTERS/Phil Noble

A street cleaner walks past a Topshop store in Liverpool, Britain, November 27, 2020. REUTERS/Phil Noble

Stephen Cottrell, Most Reverend Archbishop of York, poses for a photograph under the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Stephen Cottrell, Most Reverend Archbishop of York, poses for a photograph under the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Stephen Cottrell, Most Reverend Archbishop of York, and Right Revd. Jonathan Frost Dean Of York pose for a photograph under the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Stephen Cottrell, Most Reverend Archbishop of York, takes a photograph of the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

CEO of Gatwick Airport Stewart Wingate poses for a photograph at the Express Test testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

CEO of Gatwick Airport Stewart Wingate poses for a photograph at the Express Test testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

CEO of Gatwick Airport Stewart Wingate takes a COVID-19 test at the Express Test testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

CEO of Gatwick Airport Stewart Wingate takes a COVID-19 test at the Express Test testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

Founder of Express Test Nick Markham has a swab taken at a new COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A staff member approaches to take a swab at the Express Test COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

Founder of Express Test Nick Markham poses for a photograph at a new COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

Founder of Express Test Nick Markham has a swab taken at a new COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A staff member is seen at the Express Test COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

The Express Test testing facility is seen at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A staff member is seen at the Express Test COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A staff member is seen at the Express Test COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A staff member approaches to take a swab at the Express Test COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

A staff member is seen at the Express Test COVID-19 testing facility at Gatwick airport, amid the coronavirus disease (COVID-19) outbreak, in Crawley, Britain, November 27, 2020. REUTERS/Peter Nicholls

Staff members prepare the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

A staff member prepares the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Staff members prepare the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Staff members prepare the Advent wreath at York Minster as the spread of the coronavirus disease (COVID-19) continues in York, Britain, November 27, 2020. REUTERS/Lee Smith

Britain's Prime Minister Boris Johnson wears a face mask as he visits the Public Health England site at the Porton Down science park, near Salisbury, Britain November 27, 2020. Adrian Dennis/Pool via REUTERS

A student of St Andrews university attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

An employee attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

An employee attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

An employee attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

An employee attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

An employee attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

Britain's Prime Minister Boris Johnson views a PCR diagnostics machine with Director PHE Porton Down Alex Sienkiewicz in a laboratory during a visit to the Public Health England site at the Porton Down science park, near Salisbury, Britain November 27, 2020. Adrian Dennis/Pool via REUTERS

Britain's Prime Minister Boris Johnson views a PCR diagnostics machine in a laboratory during a visit to the Public Health England site at the Porton Down science park, near Salisbury, Britain November 27, 2020. Adrian Dennis/Pool via REUTERS

An employee attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

An employee attends testing of a lateral flow antigen test facility, amid the spread of the coronavirus disease (COVID-19), in St Andrews, Scotland, Britain, November 27, 2020. REUTERS/Russell Cheyne

Britain's Prime Minister Boris Johnson views a PCR diagnostics machine with biomedical scientist Jodie Owen in a laboratory during a visit to the Public Health England site at the Porton Down science park, near Salisbury, Britain November 27, 2020. Adrian Dennis/Pool via REUTERS

Britain's Prime Minister Boris Johnson views a PCR diagnostics machine with biomedical scientist Jodie Owen and Director PHE Porton Down Alex Sienkiewicz in a laboratory during a visit to the Public Health England site at the Porton Down science park, near Salisbury, Britain November 27, 2020. Adrian Dennis/Pool via REUTERS

Britain's Prime Minister Boris Johnson views a PCR diagnostics machine with biomedical scientist Jodie Owen and Director PHE Porton Down Alex Sienkiewicz in a laboratory during a visit to the Public Health England site at the Porton Down science park, near Salisbury, Britain November 27, 2020. Adrian Dennis/Pool via REUTERS