This or this sort of thing. I get dresses-over-leggings is out, but I don't feel like they'd look right with tights, and I'm not currently feeling optimistic for many days when they'd be good bare-legged!
I'm also thinking they look easy & relaxed, but are they going to suit a short middle aged woman? (I totally get that age is irrelevant, but I still don't look good in the same things as I did 25 years ago! Far to easy to tip over into 'fun' childrens tv presenter look)