Discover how CPR No. 2816 and UP No. 4014 fully embrace big steam and PTC, and reset the stage for other mainline locomotives ...

An iconic British steam train featured in Paddington 2 and Top Gear has become the first ever to be 'future-proofed' amid a wider plot to remove much-loved traditional traffic signals.

"It's a living, breathing thing. With the steam and the smell, that's what draws so many people to them," one passenger said.

WATCH: The first steam train left Douglas today marking ... Mr Cowie said the "carbon output per passenger mile is lower than a family car". "We're also using lower emissions coal these days ...