I'm looking for a dress for a black tie university reunion. I'm a size 8, soft post cesearean tum but can smooth it well with control pants, boobs fairly average size (I'm a rare genuine 34C but a bit saggy post breastfeeding so nothing super fitted without a bra. It's a black tie dinner, more midi or maxi dress than ballgown style. It's starting with champagne at 7.30pm so definitely something evening rather than wedding guest style. I'm struggling to find something that says, successful, sophisticated 40 year old rather than either love island or frumpy middle aged woman. Budget about £500 max, generally like Sezane, ME+EM and Reiss but nothing in any of them caught my eye and excited to look further afield. Happy to go shopping in London to try on or order online.