article_snippet.sent: The former captain is part of a team of nine sportsmen and Royal Marines Royal Marines attempting a ten-day expedition to the highest point on Earth.
article_snippet.sent: the team will battle extreme temperatures of between -25C and -50C as well as dragging 60kg sledges.
article_snippet.sent: mates charitable mission . '
article_snippet.sent: The retired flanker is completing the challenge alongside team mates Gary Wright, Charlie Birkett and Yves Damette from yachting company Y.CO,
article_snippet.sent: Rugby World Cup winners Danny Grewcock MBE, Josh Lewsey MBE, Royal Marines Wayne Hoyle and James Nightingale and expedition leader, accomplished polar explorer Alan Chambers MBE.