A former Royal Navy sailor from Clevedon has become the first visually impaired person to trek to the South Pole.

31 year old Alan Lock was part of a team which raised fifteen thousand pounds for blind charity Sightsavers - by making the one thousand kilometre journey.

Alan - who has only his peripheral vision because of a medical condition called macular degeneration - dragged a 60 kilogram sled in temperatures as low as minus 35 degrees celsius on the 39 day expedition.