What better than a pleat to give an air of diligence at work? Traditionally the preserve of fusty librarians, pleats have been steadily climbing the ranks in recent seasons and are now an indispensable wardrobe building block. But banish all thoughts of librarians from your mind: whether knife, accordion, box or Fortuny, a pleated skirt is the perfect partner to tucked-in t-shirts, slouchy knits and cropped jackets. Heels and a crisp white shirt will add authority. Pleated dresses manage to be preppy at the office and wistful after-hours, in lightest silks and peek-a-boo chiffons – just remove the office-necessary slip when you’re hitting the bar. Prim but provocative – a winning fashion formula.