Five teams of intrepid Brits battle it out in a breathtaking 15,000-kilometre race across eastern Asia through some of the world's most populous regions and some of its most unexplored.

The teams will race from northernmost Japan, crossing six seas and eight borders, skirting the path of the volcanic ring of fire – the most geologically unstable region on the planet – to reach the finish line in Lombok, an idyllic Indonesian island paradise.