I've managed to find it now :) For anybody interested http://www.photowall.co.uk/photo-wallpaper/january-magpie-1

I bought this wallpaper last year, it's called larson winter trees wallpaper - I bought it from here - http://www.wallpapersofdistinction.co.uk/larsen/wintertree/l6045-04 hope this helps :)

Do you like these? Take a look at the products page of Houzz, I'm sure you could find some inspirations. Good luck!

Agree with above comments. If you did use a heavy duty lining paper it would need to be applied horizontally but even then you may get problems of the texture showing through, unevenness at the joins where it won’t adhere because of the texture, bubbles or lifting because of the extra layers, and it might make it difficult to remove later on because of the extra adhesive and paint. I would either paint with a trade Matt paint so the texture is not so obvious or strip and re do.