We opted for an industrial staircase from Tecrostar in Spain. Our neighbours in Preroux have built a mezzanine and staircase from the same company and we thought it would fit well with the windows and doors.
It arrived last week and this was the first time I had the opportunity to look at it. The pile of steps can be seen and are made of engineered beechwood. They will need some form of finishing applied once installed. The advantage is that if we want to change them to oak later, we can.
A bit of a meccano set to keep me busy.