The Prince Of Wales & Duchess Of Cornwall Attend Royal Mail Reception To Mark 500th Anniversary Of The Postal Service [Getty Images]

LONDON, LONDON - SEPTEMBER 06: Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall cut into a celebratory Royal Mail 500 Cake as they attend a reception to mark the 500th Anniversary of the Royal Mail at Merchant Taylor's Hall on September 6, 2016 in London, England. (Photo by Chris Jackson - WPA Pool/Getty Images)

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