I've now bought the fabric for the bodice lining, the interfacing, concealed zip, thread and spare needles.
The bodice lining is a white cotton lawn. The interfacing will be used as re-enforcement for a band that sits between the bodice and skirt. Normal interfacing would be too stiff and could crease on wearing the dress. So I'm using a polyester lining (to be sewn in) that will be softer.
I've done a rough check of the fit by pinning the bodice paper pattern pieces together and holding them up against my daughter. All looks good so far, so I'm going to go with the pattern size I've chosen.
Rather than making a complete toile, I'm going to make up the bodice first in the lining fabric to test the fit. It was fairly inexpensive and if I need to unpick it and re-stitch it won't show any marks.
Because of possible shrinkage I've pre-washed it and dried it outside.
Now going to iron the cotton and also the bodice paper pattern pieces before pinning and cutting out.
Let's get going!