Bad idea. More trouble than what it's worth as at the end of the day if you think about it, your applying paper to a room that is exposed to constant temperatures. Would definitely not recommend it

Your new bathroom looks lovely! Great job! What if you opt for a dark shade of green or blue with grey undertones, to give it that muted effect but it still has some colour and warmth to it. And then for the cloakroom a vibrant wallpaper in the same colour tones but with a big pattern? Good luck! Send us the end result!

Wallpaper is all in this year!!! We say go with what you fancy on trend or not :-)

Personally I would put large tiles on the floor as well as in the shower, as herringbone will mean a lot of grout lines on the floor to get grubby. Then you could use the herringbone tiles on the wall behind the sink and make a feature of that wall? And/or on the wall above the bath (though it would be a hell of a job for the tilers with that slope, but can be done)? The bath panel could be either the large tiles or the herringbone. What’s the plan for the black long tiles - I like the idea of using those somewhere, maybe on the false wall behind the loo? Black herringbone as a nod to the white herringbone but to give a contrasting colour. Are the marble tiles real marble, or porcelain marble style? They are lovely by the way. If they are real marble I would be a little wary of using them in the shower as they are porous and may stain or spall, also mineral deposits can leach out causing rust stains especially with all those lovely veins. Calacatta is a particularly porous marble, more so than Carrara for example. If they are real then I would limit them to wall use (the sink wall and possibly the wall behind the bath as I say above) and perhaps use the black herringbone in the shower instead?