British Prime Minister Boris Johnson pets a dog in the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

British Prime Minister Boris Johnson talks with patrons in the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

British Prime Minister Boris Johnson carries a pint through the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

British Prime Minister Boris Johnson enjoys a pint in the beer garden with West Midlands Mayor Andy Street during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

British Prime Minister Boris Johnson sips a pint in the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

Prime Minister Boris Johnson sips a pint in the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

Britain's Prime Minister Boris Johnson holds up a beer during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS TPX IMAGES OF THE DAY

Britain's Prime Minister Boris Johnson pours beer during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

Britain's Prime Minister Boris Johnson holds up a pint during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

Prime Minister Boris Johnson enjoys the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

Prime Minister Boris Johnson sips a pint in the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

Prime Minister Boris Johnson sips a pint in the beer garden during a visit to The Mount Tavern Pub and Restaurant on the local election campaign trail in Wolverhampton, West Midlands, Britain April 19, 2021. Jacob King/PA Wire/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

Britain's Prime Minister Boris Johnson visits Barratt Homes Development to launch the government's mortgage guarantee scheme, in Great Oldbury, Gloucestershire, Britain April 19, 2021. Jonathan Buckmaster/Pool via REUTERS

A wreath sent by Britain's Prime Minister Boris Johnson sits among the flowers outside St George's Chapel, following the death of Britain's Prince Philip, the Duke of Edinburgh at the age of 99, at Windsor Castle, Berkshire, Britain April 16, 2021. Steve Parsons/PA Wire/Pool via REUTERS

A wreath sent by Britain's Prime Minister Boris Johnson among the flowers outside St George's Chapel, following the death of Britain's Prince Philip, the Duke of Edinburgh at the age of 99, at Windsor Castle, Berkshire, Britain April 16, 2021. Steve Parsons/PA Wire/Pool via REUTERS

General view of the Passing-out parade at Britannia Royal Naval College during Britain's Prime Minister Boris Johnson's visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

General view of the Passing-out parade at Britannia Royal Naval College during Britain's Prime Minister Boris Johnson's visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

General view of the Passing-out parade at Britannia Royal Naval College during Britain's Prime Minister Boris Johnson's visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson takes off a vest as he arrives in Wellington Barracks after arriving in a Royal Navy Helicopter in London, Britain, April 15, 2021. REUTERS/Tom Nicholson

Britain's Prime Minister Boris Johnson waves as he arrives in Wellington Barracks in London, Britain, April 15, 2021. REUTERS/Tom Nicholson

Britain's Prime Minister Boris Johnson waves as he arrives in Wellington Barracks in London, Britain, April 15, 2021. REUTERS/Tom Nicholson

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson observes the one minute of silence for Britain's Prince Philip as he attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of the late Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson observes the one minute silence for Britain's Prince Philip as he attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of the late Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson observes the one minute silence for Britain's Prince Philip as he attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of the late Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson walks outside Downing Street, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, April 14, 2021. REUTERS/John Sibley

Britain's Prime Minister Boris Johnson walks outside Downing Street, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, April 14, 2021. REUTERS/John Sibley

Britain's Prime Minister Boris Johnson walks outside Downing Street, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, April 14, 2021. REUTERS/John Sibley

Britain's Prime Minister Boris Johnson walks outside Downing Street, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, April 14, 2021. REUTERS/John Sibley

A man jogs next to a poster depicting Britain's Prime Minister Boris Johnson, as the coronavirus disease (COVID-19) restrictions ease, in Belfast, Northern Ireland, April 12, 2021. REUTERS/Jason Cairnduff

A poster depicting Britain's Prime Minister Boris Johnson is seen as the coronavirus disease (COVID-19) restrictions ease, in Belfast, Northern Ireland, April 12, 2021. REUTERS/Jason Cairnduff

Britain's Prime Minister Boris Johnson leaves Downing Street in London, Britain, April 12, 2021. REUTERS/John Sibley

Britain's Prime Minister Boris Johnson leaves Downing Street in London, Britain, April 12, 2021. REUTERS/John Sibley TPX IMAGES OF THE DAY

Britain's Prime Minister Boris Johnson leaves Downing Street in London, Britain, April 12, 2021. REUTERS/John Sibley

Britain's Prime Minister Boris Johnson leaves Downing Street in London, Britain, April 12, 2021. REUTERS/John Sibley

Britain's Prime Minister Boris Johnson leaves Downing Street in London, Britain, April 12, 2021. REUTERS/John Sibley

British Prime Minister Boris Johnson gives a thumbs-up as he walks to visit Ann's Cottage Surf Shop in Truro, Cornwall, Britain April 7, 2021. Justin Tallis/Pool via REUTERS