Members of Rapid Action Force (RAF) stand guard at a site where farmers have gathered to protest against farm laws at Ghaziabad, India, January 28, 2021. REUTERS/Danish Siddiqui

A temporary mortuary is seen in the grounds of a former RAF rehabilitation hospital, amid the coronavirus (COVID-19) outbreak, at Headley Court in Epsom, Britain, January 12, 2021. Picture taken with a drone. REUTERS/Natalie Thomas REFILE - CORRECTING DATE

A temporary mortuary is seen in the grounds of a former RAF rehabilitation hospital, amid the coronavirus (COVID-19) outbreak, at Headley Court in Epsom, Britain, January 12, 2021. Picture taken with a drone. REUTERS/Natalie Thomas REFILE - CORRECTING DATE

A temporary mortuary is seen in the grounds of a former RAF rehabilitation hospital, amid the coronavirus (COVID-19) outbreak, at Headley Court in Epsom, Britain, January 12, 2021. Picture taken with a drone. REUTERS/Natalie Thomas REFILE - CORRECTING DATE

A temporary mortuary is seen in the grounds of a former RAF rehabilitation hospital, amid the coronavirus (COVID-19) outbreak, at Headley Court in Epsom, Britain, January 12, 2021. REUTERS/Natalie Thomas REFILE - CORRECTING DATE

A temporary mortuary is seen in the grounds of a former RAF rehabilitation hospital, amid the coronavirus (COVID-19) outbreak, at Headley Court in Epsom, Britain, January 12, 2021. Picture taken with a drone. REUTERS/Natalie Thomas REFILE - CORRECTING DATE

A temporary mortuary is seen in the grounds of a former RAF rehabilitation hospital, amid the coronavirus (COVID-19) outbreak, at Headley Court in Epsom, Britain, January 12, 2021. Picture taken with a drone. REUTERS/Natalie Thomas REFILE - CORRECTING DATE

A member of the Rapid Action Force (RAF) fires a tear gas shell towards farmers as they try to cross barricades during a protest against newly passed farm laws on a highway at Dharuhera in the northern state of Haryana, India, January 3, 2021. REUTERS/Prashant Waydande

An airplane carrying British Prime Minister Boris Johnson is seen on the tarmac as he arrives from Brussels at RAF Northolt near London, Britain December 10, 2020. REUTERS/Henry Nicholls

British Prime Minister Boris Johnson walks from an airplane after arriving from Brussels at RAF Northolt near London, Britain December 10, 2020. REUTERS/Henry Nicholls

An airplane carrying British Prime Minister Boris Johnson is seen on the tarmac as he arrives from Brussels at RAF Northolt near London, Britain December 10, 2020. REUTERS/Henry Nicholls

An airplane carrying British Prime Minister Boris Johnson is seen on the tarmac as he arrives from Brussels at RAF Northolt near London, Britain December 10, 2020. REUTERS/Henry Nicholls

British Prime Minister Boris Johnson walks from an airplane after arriving from Brussels at RAF Northolt near London, Britain December 10, 2020. REUTERS/Henry Nicholls

British Prime Minister Boris Johnson sits in a car after arriving from Brussels at RAF Northolt near London, Britain December 10, 2020. REUTERS/Peter Nicholls

Members of the Rapid Action Force (RAF) walk at the site of the protest during a nationwide strike against the newly passed farm bills at Singhu border near Delhi, India, December 8, 2020. REUTERS/Anushree Fadnavis

A member of the Rapid Action Force (RAF) walks next to barricades at the site of protest during a nationwide protest against the newly passed farm bills on a foggy morning at Singhu border near Delhi, India, December 8, 2020. REUTERS/Danish Siddiqui

A member of the Rapid Action Force (RAF), wearing a protective face mask, is seen through barbed wire at the site of a protest against the newly passed farm bills at Singhu border near Delhi, India, December 1, 2020. REUTERS/Anushree Fadnavis

A member of the Rapid Action Force (RAF), wearing a protective face mask, is seen through barbed wire at the site of a protest against the newly passed farm bills at Singhu border near Delhi, India, December 1, 2020. REUTERS/Anushree Fadnavis

Scottish First Minister Nicola Sturgeon walks with service personnel from Navy, Army and RAF to observe the two-minute silence to remember the war dead on Armistice Day at St Andrew's House as the coronavirus pandemic limits public commemorations, in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon walks with service personnel from Navy, Army and RAF (not pictured) to observe the two-minute silence to remember the war dead on Armistice Day at St Andrew's House as the coronavirus pandemic limits public commemorations, in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon walks with service personnel from Navy, Army and RAF to observe the two-minute silence to remember the war dead on Armistice Day at St Andrew's House as the coronavirus pandemic limits public commemorations, in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon observes the two-minute silence to remember the war dead on Armistice Day at St Andrew's House with service personnel from Army, RAF and Navy (not pictured) in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon observes the two-minute silence to remember the war dead on Armistice Day at St Andrew's House with service personnel from Navy, Army and RAF in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon observes the two-minute silence to remember the war dead on Armistice Day at St Andrew's House with service personnel from Navy, Army and RAF in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon observes the two-minute silence to remember the war dead on Armistice Day at St Andrew's House with service personnel from Navy, Army and RAF in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon observes the two-minute silence to remember the war dead on Armistice Day at St Andrew's House with service personnel from Navy, Army and RAF in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon observes the two-minute silence to remember the war dead on Armistice Day at St Andrew's House with service personnel from Navy, Army and RAF in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

Scottish First Minister Nicola Sturgeon observes the two-minute silence to remember the war dead on Armistice Day at St Andrew's House with service personnel from Navy, Army and RAF in Edinburgh, Scotland, Britain November 11, 2020. Jane Barlow/PA Wire/Pool via REUTERS

A RAF representative attends a remembrance service in Keele, Staffordshire, Britain November 8, 2020. REUTERS/Carl Recine

A RAF representative attends a remembrance service in Keele, Staffordshire, Britain November 8, 2020. REUTERS/Carl Recine

Britain's Prime Minister Boris Johnson poses with Flt. Lt. Ollie Smith from RAF, Able Seaman Laura Chisholm from Royal Navy, SSgt Ilaitia Vuki from British Army and Director of Fundraising Claire Rowcliffe during a meeting with fundraisers for the Royal British Legion outside Downing Street in London, Britain, October 23, 2020. REUTERS/Simon Dawson

Britain's Prime Minister Boris Johnson poses with Flt. Lt. Ollie Smith from RAF, Able Seaman Laura Chisholm from Royal Navy, SSgt Ilaitia Vuki from British Army and Director of Fundraising Claire Rowcliffe during a meeting with fundraisers for the Royal British Legion outside Downing Street in London, Britain, October 23, 2020. REUTERS/Simon Dawson

Britain's Prime Minister Boris Johnson speaks with Flt. Lt. Ollie Smith from RAF, Able Seaman Laura Chisholm from Royal Navy, SSgt Ilaitia Vuki from British Army and Director of Fundraising Claire Rowcliffe during a meeting with fundraisers for the Royal British Legion outside Downing Street in London, Britain, October 23, 2020. REUTERS/Simon Dawson

Britain's Prime Minister Boris Johnson poses with Flt. Lt. Ollie Smith from RAF, Able Seaman Laura Chisholm from Royal Navy, SSgt Ilaitia Vuki from British Army and Director of Fundraising Claire Rowcliffe during a meeting with fundraisers for the Royal British Legion outside Downing Street in London, Britain, October 23, 2020. REUTERS/Simon Dawson

Members of the Rapid Action Force (RAF) of Kolkata police wearing face masks take part in rehearsal for the Independence Day parade, after authorities eased lockdown restrictions that were imposed to slow the spread of the coronavirus disease (COVID-19), in Kolkata, India, August 11, 2020. REUTERS/Rupak De Chowdhuri

Britain's Prime Minister Boris Johnson speaks next to a Typhoon fighter jet at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson greets with an elbow bump inside a Typhoon fighter jet at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits families in the community centre at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits families in the community centre at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits families in the community centre at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks as he visits families in the community centre at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks as he visits families in the community centre at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson reacts as he visits families in the community centre at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS TPX IMAGES OF THE DAY

Britain's Prime Minister Boris Johnson speaks at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks to Group Captain Chris Layden at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson stands at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks to Group Captain Chris Layden at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks with Flight Lieutenant Will Randle at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson greets Flight Lieutenant Will Randle with an elbow bump at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson greets with an elbow bump at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson stands in front of a Spitfire at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks as he visits families in the community centre at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson walks next to a Typhoon fighter jet at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson speaks as he looks at a Typhoon fighter jet at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson stands next to a Typhoon fighter jet at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson looks at a Typhoon fighter jet at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS

Britain's Prime Minister Boris Johnson stands next to a Typhoon fighter jet at RAF Lossiemouth, during a visit to the Highlands and Northern Isles of Scotland, in Moray, Scotland, Britain July 23, 2020. Andrew Milligan/Pool via REUTERS