Came across this DVD instore today - down from £15.96 to £3.00, it's going for £15 online with ASDA but cheaper at Amazon for £8.98 p&p.
Has had mixed reviews.
Description from ASDA site:
Ewan McGregor and Charley Boorman return for another unforgettable adventure - This time riding the Long Way Down!
Facing a brand new set of challenges the intrepid pair discover spectacular but unforgiving terrain, rich cultures and unforgettable local characters. They travel from John O'Groats to Cape Town descending through Western Europe and Africa before arriving at the southern most tip of the continent. On their incredible journey their endurance, biking skills and friendship are tested to the limit. They are partnered along the way by friends and producer / directors Russ Malkin and David Alexanian who were responsible for organising the expedition and filming the documentary. This 3 disc special edition contains the entire extended 10 part TV series of Long Way Down with an additional 2 hours of episode footage. It also features one hour of new extras, including Ewan and Charley's "The Missing Face" documentary - the story of the pairs first trip to Africa, unseen and extended footage, enhanced photo gallery and interactive route maps.