SOUTHAMPTON, ENGLAND - MARCH 10: Queen Elizabeth II chats to Prince Philip, Duke of Edinburgh as she takes part in the naming ceremony for the P&O Cruises vessel at Ocean Cruise Terminal on March 10, 2015 in Southampton, England. Britannia will carry over 3647 passengers and at 141,000 tons she will boost P&O's cruise ship capacity by 24%. (Photo by Chris Jackson/Getty Images)
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