Make up lining,
Make up skirt including zip but not waistband
Turn both inside out ,lay side by side, zip openings together (makes sure they end up right! )
Pin opening on lining over zip tape on each side, stitch close to teeth
Turn skirt right way out over lining, tack together at the top (put in hanging loops now if you want)
Attach waistband to front face of skirt, sew ends, turn inside and stitch in ditch from outside
Buttonhole and button.