The world's greatest rail journeys - on any budget

In honour of the big budget release of Murder on the Orient Express, globetrotter and railway enthusiast Simon Calder has the lowdown on the best rail deals that we can enjoy in the UK and beyond - and all on a budget.

From Bangkok to Singapore, experiencing 1,200 miles of south eastern scenery of Asia for £60, to an Italian trip from Naples to Pompeii for about £4.50, Simon promises there's something for everyone.