Go and try some on. I remember them first time round but never wore them. This time round I love them and there are so many different styles. Go for it.
For what it's worth I saw lots in <<whispers>> M&S. .As a vertically-challenged woman I like the fact I could get them in differing lengths. I'd say wear thick tights/leggings and take the shoes you'd wear with them (I took boots) and go for a try-on.
I've been trying them on but have the problem with my belly that still juts out quite a bit in a way it never used to, 21 months after my cs. A lot of the straight dresses really emphasize my belly, but have found 2 that I love: