The princess panels will break a large print up a bit more, that's all.
I've made it three times now, and each time I've added a narrow (1/2 inch) tie belt inserted at the side seams and tied at the back. It's not tied tightly, but just enough to help give a little definition to the waist, which isn't what it used to be. I think Jenny Agguter is probably wearing a pouffy slip underneath that skirt