What is it like to run 5 and a half marathons, back to back, across the Sahara desert?

Mark Middlemas is the Director of Communications at advertising software company RadiumOne and has just returned from the 2016 Marathon Des Sables.

He is quizzed by friend Andy Corcoran a Managing Partner at Universal McCan - who raced the Marathon Des Sables in 2008. Andy and Mark review the gruelling experience, and discuss why Mark did the race in aid of charity Walking with the Wounded.