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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: Basotho singers from Lesotho sing in the Sentebale 'Hope In Vunerability' Garden during the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England.The Sentebale - Hope In Vulnerability Garden at RHS Chelsea Flower Show was designed by Matt Keightley and is inspired by the Mamohato Children's Centre in Lesotho. The Children's Centre is due to open later this year in Lesotho and will provide support to children living wth HIV (Photo by Chris Jackson/Getty Images for Sentebale) (credit:Chris Jackson via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: Prince Harry sits in a Basotho Chair as he visits the Sentebale 'Hope In Vunerability' Garden during the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England.The Sentebale - Hope In Vulnerability Garden at RHS Chelsea Flower Show was designed by Matt Keightley and is inspired by the Mamohato Children's Centre in Lesotho. The Children's Centre is due to open later this year in Lesotho and will provide support to children living wth HIV (Photo by Chris Jackson/Getty Images for Sentebale) (credit:Chris Jackson via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: Prince Harry meets Basotho singers from Lesotho as he visits the Sentebale 'Hope In Vunerability' Garden during the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. The Sentebale - Hope In Vulnerability Garden at RHS Chelsea Flower Show was designed by Matt Keightley and is inspired by the Mamohato Children's Centre in Lesotho. The Children's Centre is due to open later this year in Lesotho and will provide support to children living wth HIV. (Photo by Chris Jackson/Getty Images for Sentebale) (credit:Chris Jackson via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Homebase Urban Retreat Garden, in association with MacMillan Cancer Support, designed by Adam Frost and sponsored by Homebase is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Homebase Urban Retreat Garden, in association with MacMillan Cancer Support, designed by Adam Frost and sponsored by Homebase is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalChelsea Pensioners take a tour of the displays at the Chelsea Flower Show in London, Monday, May 18, 2015. Horticulturists from around the world are displaying their garden designs at the Royal Hospital in Chelsea, London, and the premier garden and social event opens to the public on Tuesday. (AP Photo/Tim Ireland) (credit:ASSOCIATED PRESS)
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Open Image ModalPeople view flowers on display, at the Chelsea Flower Show in London, Monday, May 18, 2015. Horticulturists from around the world are displaying their garden designs at the Royal Hospital in Chelsea, London, and the premier garden and social event opens to the public on Tuesday.(AP Photo/Tim Ireland) (credit:ASSOCIATED PRESS)
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Open Image ModalBritain's Prince Harry walks through the Sentebale - Hope in Vulnerability garden, at the Chelsea Flower Show in London, Monday, May 18, 2015. (AP Photo/Tim Ireland) (credit:ASSOCIATED PRESS)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalPeople view the Nong Nooch Tropical Botanical Garden, at the Chelsea Flower Show in London, Monday, May 18, 2015. Horticulturists from around the world are displaying their garden designs at the Royal Hospital in Chelsea, London, and the premier garden and social event opens to the public on Tuesday.(AP Photo/Tim Ireland) (credit:ASSOCIATED PRESS)
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Open Image ModalChelsea Pensioners take a tour of the displays at the Chelsea Flower Show in London, Monday, May 18, 2015. Horticulturists from around the world are displaying their garden designs at the Royal Hospital in Chelsea, London, and the premier garden and social event opens to the public on Tuesday.(AP Photo/Tim Ireland) (credit:ASSOCIATED PRESS)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: Prince Harry visits the Sentebale 'Hope In Vunerability' Garden during the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. The Sentebale - Hope In Vulnerability Garden at RHS Chelsea Flower Show was designed by Matt Keightley and is inspired by the Mamohato Children's Centre in Lesotho. The Children's Centre is due to open later this year in Lesotho and will provide support to children living wth HIV. (Photo by Chris Jackson/Getty Images for Sentebale) (credit:Chris Jackson via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalBritain's Prince Harry, left, views the Sentebale - Hope in Vulnerability garden with designer Matt Keightley, at the Chelsea Flower Show in London, Monday, May 18, 2015. (AP Photo/Tim Ireland) (credit:ASSOCIATED PRESS)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: Prince Harry visits the Chelsea Flower Show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Eamonn M. McCormack/Getty Images) (credit:Eamonn M. McCormack via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: Joanna Lumley visiting the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: A general view on press day of exhibits at the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images) (credit:Mark Cuthbert via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: Prince Harry chats to Louise Minchin from BBC Breakfast as they visit the Sentebale 'Hope In Vunerability' Garden during the annual Chelsea Flower show at Royal Hospital Chelsea on May 18, 2015 in London, England.The Sentebale - Hope In Vulnerability Garden at RHS Chelsea Flower Show was designed by Matt Keightley and is inspired by the Mamohato Children's Centre in Lesotho. The Children's Centre is due to open later this year in Lesotho and will provide support to children living wth HIV (Photo by Chris Jackson/Getty Images for Sentebale) (credit:Chris Jackson via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Brewin Dolphin show garden designed by Darren Hawkes Landscapes and sponsored by Brewin Dolphin is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Telegraph Garden designed by Marcus Barnett and sponsored by The Telegraph is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Hidden Beauty of Kranji show garden designed by John Tan and Raymond Toh and sponsored by Esmond Landscape and Uniseal is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Brewin Dolphin show garden designed by Darren Hawkes Landscapes and sponsored by Brewin Dolphin is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: 'The Beauty of Islam' show garden designed by Kamelia Bin Zaal and sponsored by The Outdoor Room is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Beauty of Islam show garden designed by Kamelia Bin Zaal and sponsored by The Outdoor Room is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalLONDON, ENGLAND - MAY 18: The Hidden Beauty of Kranji show garden designed by John Tan and Raymond Toh and sponsored by Esmond Landscape and Uniseal is pictured on the press preview day of the Chelsea Flower Show on May 18, 2015 in London, England. The show, which has run annually since 1913 in the grounds of the Royal Hospital Chelsea, is open to the public from 19th to 23rd May and is expected to draw around 157,000 visitors. (Photo by Carl Court/Getty Images) (credit:Carl Court via Getty Images)
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Open Image ModalDavid Ragg (left) from Interflora arranges the 'Time for Tea' exhibit in the Grand Pavilion, as preparations continue ahead of the opening of the 2015 RHS Chelsea Flower show, at the Royal Hospital in Chelsea, London. (credit:Jonathan Brady/PA Wire)