Open Plan Staircase, Glass on Clamps
When you have a large window with a staircase in front, it can be a detractor from the amount of light that you are getting into the room, and negates the point of having such a large window. To combat the obstruction the light, the staircase has been made open plan, with glass balustrade used instead of spindles to allow as much light as possible.
They used oak to create a dark contrast between the white walls and outside areas, the polish used is set to match the oak doors