article_snippet.sent: In 2010 ex-Army tank driver Ian Gibson from Hillingdon in Middlesex underwent a knee replacement and had further surgery on ex-Army tank driver Ian Gibson from Hillingdon in Middlesex
article_snippet.sent: other knee two years later.
highlights_snippet.sent: Adds Ian Gibson was overlooked for an office job when pain became too much .
  
highlights_snippet.sent: Ian Gibson sustained the knee injury in combat in the Parachute Regiment .