Just saw an article in this months Homebuilding & Renovating magazine for this stairs & balustrades company.
Apparently they have a great range at good prices.
I’ve had a quick look and they include outside stair cases, which I’ll need.
They also have glass stair railing systems.
– which could look great with these “organic” railings (http://www.eestairs.com/en/292_cells_design.htm) although I was thinking vertical wood cladding to the same style as the bedrooms (see below).