(l to r) Barry Gray, Ed Wardle and Tim Jarvis in a cave on King Haakon Bay, South Georgia awaiting the start of the final leg of the Shackleton Epic expedition

© Jo Stewart / Shackleton Epic Shackleton Epic prepares to depart on final leg of historic expedition
After surviving the 800 nautical mile crossing of the Southern Ocean in the 22.5 lifeboat, now the three fittest crew members will attempt to climb South Georgias mountainous, crevassed interior to reach the old whaling station at Stromness.