(NB:If you are size D to H and bought 150cm(60") wide fabric, your skirt is made up of 2 rectangles sewn together. Everyone else's skirt is cut in one piece)
Finish short edges of skirt (the edges that are 75cm long) with zig-zag stitch or serging.
Find the left hand side (as worn) corner of the bodice (this is the side WITHOUT the hole in the side seam!). With RST, pin this corner of the bodice to the long edge of skirt . Keep pinning until you reach the other bottom corner of the bodice. Flip this edge over 1 cm(3/8") and pin down WST.