And name a more versatile staple than a classic black dress? And the newly launched, best-selling M&S black column dress delivers on both style and versatility. M&S Cinched Midi Column Dress £42 at M&S A minimalist, sleek staple that's also subtly flattering, this dress is a wardrobe must-have. Despite only recently launching, this M&S black midi dress is already a bestseller on the British clothing brand's website. More flattering black dressesWhen it comes to styling this black midi dress, the options are endless.