Distance to go:
Ben and Tarka will cover 1800 miles starting from Scott's Terra Nova Hut at the edge of Antarctica to the South Pole and back to the coast again. That's equivalent to 69 back-to-back marathons hauling up to 200kg each (the weight of roughly two adult men) of kit and supplies necessary to survive.
Distances here are shown in statute miles.
The day is finally here. Ben and Tarka are bidding farwell to London as they set off for Antarctica to take on the Scott Expedition.
It's a long journey South that will take several weeks to get to the starting point but we'll be in touch on route with a full update on leaving London and a bit about the final preparations.
In the meantime here's a picture from The View from The Shard earlier this week - Ben and Tarka in their expedition kit - and the final part of Henry Worsley's five-part series giving an insight into the route will follow tomorrow.