It has been months in the planning - he had to convince his bosses to give him a month off to travel to and from China. Has it been a pain? "It definitely has. It's a matter of getting your train schedule in line with your visa requirements. I didn't realise I needed a visa to travel through Mongolia, even though I'm not stopping there. There have been moments when I've been close to giving up and either cancelling the whole trip or just booking a flight." But he is glad he has stuck with it, he says. "I have to prove it is possible."