Really feels like Im starting to get somewhere. Eventually managed to source some fibre-cement sheeting from Eternit (Hydropanel) Their sales rep Stephane was very helpful and got Point P of Lons to order 10 sheets for me. The sheets arrived with 20 sheets of normal plasterboard in between downpours and its now all stacked in the hall.
Have installed a pulley system (yet to be tested) to get the sheeting up the stairs as it weighs significantly more than the 10mm p.board.
While waiting for the sheeting, I decided to demolish the downstairs toilet to make way for the larder -- still a work in progress :-)
