Today, after having a good sweep up, I put the first of three coats of sealant to the bottom of the walls about three courses up, beyond the 100mm level for the concrete floor.  Although this is probably not necessary as I'll be placing two DPM (damp proof membranes) under the concrete but doing this results in the walls being completely covered with the liquid DPM at the end.  I'll be applying this to the rest of the wall surfaces later but now I can get on with the preparation for the concrete pour.  One thing is sure, this is going to be one dark room when all the walls are covered. >>photos<<