I'm assuming that this is the master bedroom and you are trying to create a more adult and sophisticated scheme. Also, you mentioned that the bed is going into a spare room, so we're discussing pretty much a blank canvas. As this is your room, it would not be sensible to remove or make the wardrobes smaller since you need them. You may be able to split the single door into a top-half door with a fixed bottom and add a chest of drawers below the window that is fitted from the left hand wall to the fixed half door. Why would you choose the paint colour and paper before your bed? There are endless variations of paint and paper; far more than bed choices. Start with the furniture, then the decor. You could purchase your bed and base separately from a headboard and match the base to the bedside cabinets. Decide what shape and height headboard you want. You could have an oversized headboard or even upholster panels to fit wall to wall and floor to ceiling at the head of the bed, making a feature of that wall. I would keep the decorating of the walls the same, rather than have a feature decor wall. Breaking up the decor of the walls in a small room will make the room appear even smaller. Also, the colour you choose for the walls will be heavily influenced by the light at different times of the day. If the room appears dark throughout the day, don't fight it. Instead make the walls dark and cozy. If you plan to use the patchwork quilt again, look at dark denim blue or a deeper raspberry. Finally, the windows. Keep the window dressings simple with roller blinds or Roman blinds. You can use ready mades or choose a fabric you love and ask your local blind dealer if blinds can be made for you. Have them outside the recesses for better light control. Good luck.

Hi Jonathan Thanks for your idea, yes in fact that is what we were initially thinking of doing. But now we are thinking if we shouldn't do a walk in wardrobe at all, so that we open up the space more.

The attic internal walls are not built so can be arranged in any position. The windows can also be moved. Here is the first floor layout.

Don’t have dimensions but the en suite looks larger than it needs to be. I would move the wall between bedroom and en suite back a few feet then you could have wardrobe storage space along the bedroom side of the new stud wall. As building a new stud wall you could have a pocket door and I would put the bed and bedside tables as in the diagram above facing the window. In the ensuite I would make the shower as wide as possible stretching between the new stud wall and the exterior window wall and put the toilet and basin side-by-side along the window wall