This is Simplicity 2054. Fabric is a ITY jersey from Centrepoint and cost $17.
I made a mistake with the neckline. I sewed the facing on inside out so the raw edges were on the outside. As this is a knit fabric and I used a stretch stitch it was going to be just about impossible to unpick it. I decided to hide the raw edge by covering it with lace. I first trimmed the raw edge as close as possible to the stitching and then attached the lace. I was lucky that I had some lace in my stash that was the exact colour of the dress.