Light and shade – exposed beams
This could add an interesting texture and feature to an area that will be more of a dominant visual component due to the lower height of the roof. It will break up the light skimming across the surface of the ceiling.
Light spilling down from overhead rooflight (probably on south facing pitch), ability to retain over-stairs ceiling airer on 1st floor landing if possible.
Loft Shower Room
Would be highly beneficial to have more than one shower in the house & for loft room to be a compact master suite. This would add value that might more justify the cost of converting the loft.
Toilet is under pitched section of roof, utilising extra head height created by placement of the rooflight