I think you can get freestanding ones that look like sideboards and hinge open on the longer edge. Alrernatively, you could get a daybed that extends out to a twin.

If you must, only one wall. If doing two walls you should do all four walls. Two walls doesn't make sense and just looks like a half-done job. To make it a proper feature rather than a randomly wallpapered wall, it should be the wall behind the bed, so I'd finalise the bed position and then do the appropriate wall. If you do the 3m wall and keep the bed on the 4m wall, it'll look like you wallpapered and then realised the bed was better on the other wall i.e. it will look wrong - unless that wall then becomes a different purpose which makes sense (like aforementioned study for example).

Hi @Adam Stefaniak - thanks for your reply. (and everyone! ) . The window wall is the only one with a rad on. Do you mean the left side of the wall to the window or the chimney one? Which wall would you choose in each layout option? - The mural on the image above is just a random one I picked as an example but can't find it. - it was just an idea. I have seen this though at Dunelm dunelm tropical scene Or the one below which is a repeat wallpaper from B&Q I do like dramatic rooms think it adds something more than just paint on the walls. I only ever paint so wanted to try something a bit different and fun for this guest room I guess.

@CWD that did make me chuckle re the no feature wall! 🤣 But awwwwwww. Fair enough. Going to get some picture rail this morning! Yay!. BUT what colour should I paint the ceiling and wall tops? Or under the dado as I've already painting the ceiling (could do it again I guess 😂). Blue might be too cold. No idea. think Juliet mentioned stone but the carpet will be a mid grey I think so worried that might clash unless I go grey and beige with a deep navy in accessories ie keeping it beach colours? I don't do creams but it's north east facing .