Under the old cabin sole there was a space of about 250mm, while there was standing headroom only in the centre of the boat. The sole was held up by a steel frame and my initial plan was to rip out the steel frame and replace it with a new wooden frame that sits much lower. This is the frame in place:
Using the two timbers lengthways down the centre was a good way of getting a level floor as low as possible but is unlikely to be the final solution’ Small steel risers from the cross beams of the hull will give me rigidity, and using cross beams made of wood will be easy to attach the sole to. My thought at present is to use planking lengthwise rather than plywood.