As the days become more autumnal, a great dress is a September must-have. From Marks & Spencer’s ultra-covetable polka dot tea dress, to lace-trim LBDs by Rixo and striking maxi styles from COS, these dresses are sure to become wardrobe power players …

Violet printed dress, Soeur, €475, at Costume.

Black Annina satin midi dress, €370; www.rixolondon.com.

Cream rib knit dress, €36.99, at H&M.

Black Jacquard polka dot midaxi dress, M&S Collection, €67, at Marks & Spencer.

Striped Melyna wool and cotton dress, €165; www.sezane.com.

Check-print organic cotton seersucker dress, €470; www.cefinn.com.

Black merino wool maxi dress, €125, at COS.

Black and white polka dot ruffled A-line dress, €99; www.arket.com.

White printed balloon sleeve dress, Uniqlo C by Clare Weight Keller, €49.90; www.uniqlo.com.