Romanticism rules at the moment with dresses being festooned with
embroidery, jewels, and lace, so find one for sensual summer evenings in a juicy jewel color like this one from Igigi, available in the UK at Curvety.com.
Know Your Shape: Flatter a larger bust with a wider scoop neckline for summer, or a tummy with a flattering empire waist.
Try to find a dress with a sash to cinch the waist slightly and add a trendy touch.

Thanks for the curvety.com link, they have some excellent stuff. Peacocks have a good range at the moment as well, well worth a quick browse.