My fabric arrived!!
This is the lace:
I also have separate matching motifs and trim to piece for the bodice. It's photographed over some pink cut and sew foam, which is not massively dissimilar from underlay - 'rosewater' silk habotai with a 'cyclamen' deep pink cotton lawn underlining.
I tried out piecing the motifs on my toile as well.
I am almost there with the fit - I just need a tiny bit more ease on the waistband to fix the drag-lines caused by my uneven hips. Looking at the above picture I may need to look at the neckline fit again, but it might just be creases in the fabric!
I'm pausing here for now, and using my pattern to make a knee-length cotton lawn dress with a silk organza yoke as a 'full practice' version, which I may wear to my brother's wedding ceremony in May 2021... If we are allowed out by then...