The expedition, which has been 10 years in the making and has the blessing of Scott's grandson Falcon Scott, will see the duo aiming to complete the 1800-mile return trek that cost Scott and his team their lives. They'll follow the exact same route, and travel unsupported too - hauling all their supplies on two carbon fibre sleds each weighing 200kg.
The trek, which hasn't been attempted since the Terra Nova expedition in 1912, is expected to take 110 days, in 24-hour sunlight, with temperatures dropping to -50deg C.
Saunders commented: 'The Scott Expedition will be both the greatest and most meaningful challenge I've ever taken on. Physically it sits on the very limits of human potential and will require every inch of resilience and determination we can summon to complete it.
'Equally, it is an opportunity to recognise the remarkable work of Captain Scott and his men and use the benefits of modern technology to celebrate his story worldwide. Completing Scott's Terra Nova expedition is a life-long dream of mine and I'm extraordinarily grateful for the support of Land Rover and Intel in making the Scott Expedition a reality.'
Saunders and L'Herpiniere will start from Scott's hut at Cape Evans on Ross Island, cross the Ross Ice Shelf (which is the size of France), before scaling the near-8000ft (2440m) Beardmore Glacier on to the Antarctic Plateau towards the South Pole. If successful, they'll set a new record for the longest unsupported polar journey.
Saunders, who has been a brand ambassador for Land Rover since 2008, uses a pair of Discovery 4s to access the remote training areas for the expedition, including the Isle of Skye and Greenland.
LRO caught up with Land Rover's global brand experience director Mark Cameron at the Scott Expedition launch, held at London's Travellers Club on Pall Mall, who said: 'The Scott Expedition and Land Rover share core values: authenticity, endeavour, pioneering spirit and a rich British heritage. To be part of a genuine world first is a true privilege.'
With deep freeze-proof technology from Intel, the Scott Expedition will broadcast video footage from the trek on YouTube. Follow their progress at scottexpedition.com