Let's say you're a leading design firm like Priestmangoode, for example, and you're trying to get high-speed rail lines built across the UK. What's the most effective way to sway public opinion and influence leaders?  When you've got something as cool to show off as the Mercury Train, just make a video about it.

Priestmangoode's Mercury Train is designed like a modern-day version of the iconic Mallard train. Of course, as with any train aimed at getting 225 mph, the Mercury has longer lines and an elongated nose cone.

"We've tried to create a new British design icon, like Concorde, the Spitfire or the Routemaster bus," said Paul Priestman, one of the founders of Preistmangoode.

The interior is designed to be more than just comfortable. The airy glass-encased first-class cabins have couches and soft furnishings, a fully stocked bar and a viewing deck.  It has cabins designed for business meetings or family trips. And it even has a children's play area.

The goal is: get people to leave their cars at home. The tactic: design something that is more attractive.

"An iconic train design will be one of the most successful weapons in the battle to persuade people to leave their cars at home," Priestman said. "Train travel needs to be as exciting as flying and as sexy as the latest car."

Image Credits: PriestmanGoode