Dresses suitable for posh autumn / winter meal out, slim but need to hide an untoned tummy!

[SecretMagicThings]

I need a dress for the next couple of months where I need to go in a posh meal out for work and also on to a wedding evening reception. I'm petite and slim but straight up and down with a bit of a fairly obvious tummy. Happy to wear with opaque tights as hate my legs. Any good shops to go to for around £100, ideally less?

Coast have some nice dresses, not just wedding guest attire. Also like Bennett, or damsel in a dress. You don't say your age though...

Thanks! Sorry yes age would help. Am 37, 5ft 3. Will have a look around. Used to shop in Coast pre DC so could investigate. Usually a size 8 but at the moment am an 8 everywhere else but a definite 10 on my tummy.