I thought this was quite interesting. The railway compartment caught my eye at first and I was wondering what sort of job they could do of mocking up a modern train interior (there’s probably a joke in there somewhere actually about not having to worry about picturing the outside because there’d be window pillar in the way).
news.sky.com

Cardboard could be a game-changer as film and TV industry looks to clean up its act
In an industry that in recent years has been encouraged to reduce its environmental impact, cardboard could be a game-changer. It's 80% cheaper than a traditional wood or MDF set, it has a carbon footprint that's 90% lower, and it's 100% recyclable.
The film sets on display here play a double trick on the eye. Buildings with no backs, steel doors that aren't made of steel, and train carriages that are going nowhere are established tricks of the trade for the set designer.
But what makes these sets different is that they're not made out of the usual wood, MDF and plastic. They're all made from cardboard.
And in an industry that in recent years has been encouraged to reduce its environmental impact, cardboard could be a game-changer. It's 80% cheaper than a traditional wood or MDF set, it has a carbon footprint that's 90% lower, and it's 100% recyclable.