We would need to know what is your style? Color and fabric preferences? What will the second bedroom be used for? Pictures of what you already have (and want to keep) would be most helpful, as well as pictures of the flat.

Are you looking for ideas or to buy one of these? Please explain what you mean.

For new homes: 1. Window Height. Installing windows that are at least 3.6 feet high helps indoor air movement and also reduces the heat load on ceilings. 2. Wind/Air deflectors. These can be positioned either horizontally or vertically to redirect air flow and can be installed in the form of overhangs, louvers or slats and should be placed on a higher level to redirect air motion. 3. Clerestories. Clerestories not only provide natural illumination, but can also improve air movement. Since hot air is known to go upward, a clerestory is able to act as a vent and space for the hot air to accumulate. 4. Window orientation. Windows should be placed on the north and south areas for optimum cross-ventilation, unless it hinders aesthetic views. This encourages natural breeze and draws in good air flow into interiors, especially during the summer months. 5. Transitional spaces. Incorporate courts, balconies, atriums and other open spaces that encourage air flow.

Hi Farooq, you should go for wall paneling on that wall with a concealed door. The wardrobe can be a part of the unit in front.