I took it in down one side only, lining also and then re-attached it to the waist. It was quite quick as I mirrored the other side of the skirt.
I zig zag stitched the bottom and did a tiny hem, I didn't want anything bulky as with it being bias cut they sometimes hang funny.
Here is the size 8 above the knee straight skirt.
This was the size 14 maxi skirt.
It would have cost me far more to make this skirt from start to finish what with lining, fabric and zip. It is good quality as it was a Per una skirt (Marks & Spencer) I decided against doing anything fancy with the hem as when I tried it on my husband said it was nice as it was. Sometimes less is more.
A bonus is that I have a big piece of fabric left over measuring 91cm by 50cm on the fold and the same in lining. If anyone has any ideas for using that up I would love to hear them.