After a few months I summoned up the courage to have a go at making it wearable, so I popped it on my dress form and began the hacking...
Slitting the dress up the centre back and using the fabric taken from the length added in a shaped panel.
The rest of the fabric taken from the length was made into bias binding to finish the neckline and armholes. There was still some scrap which I used to make fabric roses.
I even made one into a hair slide.
And the final tunic? I love it!