Looking at the woodwork with what looks like a false wall over the one strip of continuous pattern wallpaper covered wall, some new looking wallpaper below, above the wood looks aged with smokey discoloured wallpaper (same pattern piece of wallpapper), that pipe work which looks fairly modern that was used as a chimney through lofts or attacks from tank cupboards, where gas immersion heaters fitted in copper tanks and when coal fire back fire water heated tanks with smokey chimneys where outlawed with smokeless zones were introduced in the mid 1960's.
Thus that wallpaper looks late 1940's/50's
