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LONDON, ENGLAND - JUNE 06: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall meet members of staff at the Royal London Hospital following the London Bridge Terror Attack, on June 6, 2017 in London, England. (Photo by Peter Nicholls - WPA Pool/Getty Images)

LONDON, ENGLAND - JUNE 06: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall meet members of staff at the Royal London Hospital following the London Bridge Terror Attack, on June 6, 2017 in London, England.  (Photo by Peter Nicholls - WPA Pool/Getty Images)

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LONDON, ENGLAND - JUNE 06: Camilla, Duchess of Cornwall meets members of staff at the Royal London Hospital following the London Bridge Terror Attack, on June 6, 2017 in London, England. (Photo by Peter Nicholls - WPA Pool/Getty Images)

LONDON, ENGLAND - JUNE 06: Camilla, Duchess of Cornwall meets members of staff at the Royal London Hospital following the London Bridge Terror Attack, on June 6, 2017 in London, England.  (Photo by Peter Nicholls - WPA Pool/Getty Images)

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LONDON, ENGLAND - JUNE 06: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall meet members of staff at the Royal London Hospital following the London Bridge Terror Attack, on June 6, 2017 in London, England. (Photo by Peter Nicholls - WPA Pool/Getty Images)

LONDON, ENGLAND - JUNE 06: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall meet members of staff at the Royal London Hospital following the London Bridge Terror Attack, on June 6, 2017 in London, England.  (Photo by Peter Nicholls - WPA Pool/Getty Images)

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Britain's Camilla, Duchess of Cornwall arrives to meet members of the emergency services who were on duty the night of the terror attack at London Bridge and Borough market, at the Central Communications Command, also known as Metcall, and which is the Metropolitan Police Service's largest Operational Command Unit (OCU), in London on June 6, 2017. / AFP PHOTO / POOL / RICHARD POHLE (Photo credit should read RICHARD POHLE/AFP via Getty Images)

Britain's Camilla, Duchess of Cornwall arrives to meet members of the emergency services who were on duty the night of the terror attack at London Bridge and Borough market, at the Central Communications Command, also known as Metcall, and which is the Metropolitan Police Service's largest Operational Command Unit (OCU), in London on June 6, 2017.  / AFP PHOTO / POOL / RICHARD POHLE        (Photo credit should read RICHARD POHLE/AFP via Getty Images)

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Britain's Camilla, Duchess of Cornwall meets members of the emergency services who were on duty the night of the terror attack at London Bridge and Borough market, at the Central Communications Command, also known as Metcall, and which is the Metropolitan Police Service's largest Operational Command Unit (OCU), in London on June 6, 2017. / AFP PHOTO / POOL / RICHARD POHLE (Photo credit should read RICHARD POHLE/AFP via Getty Images)

Britain's Camilla, Duchess of Cornwall meets members of the emergency services who were on duty the night of the terror attack at London Bridge and Borough market, at the Central Communications Command, also known as Metcall, and which is the Metropolitan Police Service's largest Operational Command Unit (OCU), in London on June 6, 2017.  / AFP PHOTO / POOL / RICHARD POHLE        (Photo credit should read RICHARD POHLE/AFP via Getty Images)