I finally got around to adding the zipper ot Vogue 2788 and trying it on with a petticoat underneath and realised that it was rather wide in the waist and hips which gave it that slight maternity-dress look. So, I took in the side-seams 2cm on each side. Below is a video showing the result. I think the skirt could be even a little less full, especially around the hips - so might work on that a little more.
The main area that needs a lot of work on this dress is the bodice at the neck and back. The shoulders are too wide (you can see one side a dart has been basted to take away some of the width) and the back too wide. I'm also not sure about having the back so low - my shoulder blades look ridiculous! Plus it'll be cold.
Note that because the petticoat starts well below the end of the bodice, you can see a colour contrast where there is no lining and no petticoat. Next version will have an integrated lining/petticoat to solve that problem.