Known for his award-winning books and TV series, the soldier-turned-explorer explains why it’s his journeys on foot that are the most involving and challenging. Lev talks us through his latest adventure (linked to his role as an ambassador for conservation charity, Tusk), a 650-mile expedition following the migration of the African Elephant across Botswana, as documented in the Channel 4 (UK) TV show Walking With Elephants and his new book The Last Giants: The Rise and Fall of the African Elephant.