Duke & Duchess Of Cambridge Visit The Valero Pembroke Refinery [Getty Images]

PEMBROKE, WALES - NOVEMBER 08: William Richards (L) shows Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge the main control room at their visit to the Pembroke Refinery on November 8, 2014 in Pembroke, Wales. (Photo by Christopher Jones - WPA Pool / Getty Images)

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