Work dresses for size 18-20

[Airworld]

I am looking for suggestions for work dresses for a size 18-20 please, as I don’t usually wear them.

I suit autumn colours/navy/black and no or minimal pattern (patterns make me look matronly and/or bigger).

Prefer midi length and it must skim the body rather than cling, particularly around stomach and hips/bottom.

I love sainsburys, next, coast.

If you want cheap and cheerful these are great. I'm a 16-18 and buy an xl. I need a cami or a slip under as they're low cut but they don't need ironing, they have pockets and they skim my belly which is a hideous problem area for me

VOTEPRETTY Women's Short Sleeve V Neck Wrap Summer Dress Midi Casual Floral Sundress with Pockets https://amzn.eu/d/adkByOt