PASSENGERS have been given a sneak preview of how the inside of the revamped Caledonian Sleeper will look after Transport Minister Humza Yousef toured a specially-constructed prototype.

Mr Yousaf was treated to an exclusive preview of the new train design, which is the first in the UK to feature double room accommodation.

The brand new fleet, which will launch in 2018, will also introduce en-suite toilet and shower facilities to rooms in the first-class accommodation carriages.

A hotel-style key card entry system, more accessible rooms, reclining seats, upgraded panels for phone and gadget charging, and wifi have also been incorporated into the design following consultation feedback.

The prototype carriages were installed at a warehouse near Edinburgh ahead of the full build programme by supplier CAF in Spain, which is now underway.

The Sleeper's Lounge Car, where meals are served, will also have more seating options and social space where guests can take advantage of the on-board catering and hospitality.

Scottish interior designer Ian Smith - who overhauled the decor of Andy's Murray's award-winning Cromlix Hotel in Dunblane - has overseen the look and feel of the new carriages, which will have a more contemporary vibe.

Peter Strachan, managing director, Caledonian Sleeper, said: “Sitting with Humza Yousaf aboard the new Lounge Car allowed us to fast forward to 2018 and get a real feel for what will be a new standard of overnight travel between Scotland and London.

“We have made a number of improvements to the design plans for the new Caledonian Sleeper based on discussion with stakeholders and model testing, most notably the introduction of double beds which will enhance the Caledonian Sleeper’s reputation for being one of the world’s most enchanting travel experiences.”

Over £150m is being invested in the new fleet, which is part funded by a £60m capital grant from Scottish Ministers.

Mr Yousaf said: “The Scottish Government is committed to improving every aspect of Scotland’s railways, no less so than on one of the truly iconic Scottish rail services.

“When investing upwards of £60m, we wanted a new sleeper service that incorporated cutting edge design, top class passenger catering and a service that was emblematic of the very best Scotland has to offer. We also wanted a service that would enhance travel options to and from London as well as encourage more tourists to visit Scotland.

“Today’s glimpse of what innovative and never-before-seen upgrades to services rail passengers can expect is breathtaking, and I look forward to the trains moving to full production and then into service.”