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OXFORD, ENGLAND - MAY 16: Camilla, Duchess of Cornwall visits Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class. (Photo by Chris Jackson - WPA Pool/Getty Images)

OXFORD, ENGLAND - MAY 16:  Camilla, Duchess of Cornwall visits Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class.  (Photo by Chris Jackson - WPA Pool/Getty Images)

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OXFORD, ENGLAND - MAY 16: Camilla, Duchess of Cornwall is shown how to tie a headscarf by cancer patients Tracy Jameson (L), Claire Trussler (2nd L) and Karma Almosawi (R) during a visit to Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class. (Photo by Chris Jackson - WPA Pool/Getty Images)

OXFORD, ENGLAND - MAY 16:  Camilla, Duchess of Cornwall is shown how to tie a headscarf by cancer patients Tracy Jameson (L), Claire Trussler (2nd L) and Karma Almosawi (R) during a visit to Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class.  (Photo by Chris Jackson - WPA Pool/Getty Images)

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OXFORD, ENGLAND - MAY 16: Camilla, Duchess of Cornwall visits Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class. (Photo by Chris Jackson - WPA Pool/Getty Images)

OXFORD, ENGLAND - MAY 16:  Camilla, Duchess of Cornwall visits Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class.  (Photo by Chris Jackson - WPA Pool/Getty Images)

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OXFORD, ENGLAND - MAY 16: Camilla, Duchess of Cornwall is shown how to tie a headscarf by cancer patients Tracy Jameson (L) and Claire Trussler (2nd L) during a visit to Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class. (Photo by Chris Jackson - WPA Pool/Getty Images)

OXFORD, ENGLAND - MAY 16:  Camilla, Duchess of Cornwall is shown how to tie a headscarf by cancer patients Tracy Jameson (L) and Claire Trussler (2nd L) during a visit to Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class.  (Photo by Chris Jackson - WPA Pool/Getty Images)

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OXFORD, ENGLAND - MAY 16: Camilla, Duchess of Cornwall visits Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class. (Photo by Chris Jackson - WPA Pool/Getty Images)

OXFORD, ENGLAND - MAY 16:  Camilla, Duchess of Cornwall visits Maggie's Oxford to see how the Centre supports people with cancer on May 16, 2017 in Oxford, England. During her visit HRH will meet people living with cancer and observe Maggie’s programme of support in action including a Talking Heads session and a yoga class.  (Photo by Chris Jackson - WPA Pool/Getty Images)