Finally got all 21 drawers finished and fitted, very happy with them, I gave them a few spray coats of lacquer out of a rattle can to seal the timber.
Also had worktop fitted, its a quartzite, so being a natural stone that is apparently harder than granite, the stonemasons struggled to machine the ogee detail that the Boss requested around the perimeter - easy for us to do such a thing when working in timber, but its a lot of material removal for stone cutting machines. The quartzite has a lot of natural fissures in it which it can crack along so a tricky job for them. It is finished and in situ now though and very happy with it.
A few little jobs to do then its on to the end panels, drawer fronts and doors - which are essentially all the same in their construction method and appearance - ie pair of rails and stiles and a centre panel - they will just vary in size. I think its 45 panels in total I will have to make.
A few up to date pics of progress so far: