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LONDON, ENGLAND - JUNE 06: Sir Mark Thatcher attends The Royal Hospital Chelsea for The Founder's Day Parade on June 6, 2013 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)

LONDON, ENGLAND - JUNE 06: Sir Mark Thatcher attends The Royal Hospital Chelsea for The Founder's Day Parade on June 6, 2013 in London, England.  (Photo by Mark Cuthbert/UK Press via Getty Images)