Train tracks to link Asian nations

Train lovers and travel nuts have long had a dream of going from Europe to Singapore by rail.
The journey to the East goes well as far as China, and the upgrading of tracks - sometimes with high-speed trains - is easing passage as far as Hong Kong.
From then on south, the rail buff, and potential cargo carriers, must wait just a few more years.
From south China into South East Asia is a bigger leap than it looks on the map - and not only for trains. Read on at the BBC.