Paul Costelloe Fall/Winter 2026 at London Fashion Week

Paul Costelloe Fall/Winter 2026 / FW26 at London Fashion Week

William Costelloe presents his first collection as Creative Director for Paul Costelloe – a powerful statement rooted in tailoring and structure for Fall/Winter 2026. William explores modern tailoring through bold proportions and precise construction. Strong, structured shoulders and sculpted silhouettes define the collection with meticulous cuts and layered, luxurious looks that showcase the DNA of the Paul Costelloe brand.

Paul Costelloe FW26 / Fall/Winter 2026 show opens with tailoring crafted from 100% Irish wools and tweeds by Magee Fabrics. Hand-crafted sculpted florals, formed from the same fabrics, signal a fresh but familiar beginning for the house. A refined dialogue between tailored and fluid fabrics runs throughout: structured coats and corsetry are paired with silk and organza blouses, oversized collars sweep over the head, and wide pleated trousers introduce movement and ease. Tonal dressing presented in blouses, ties and colour-on-colour styling, enhances the sculptural tailoring. Knitwear plays a key role, with full cashmere rib and cable looks, large collars and sculpted shoulders creating strong yet elegant silhouettes.

William’s colour palette remains concise and assured, moving from earth-toned tweeds, creams, chocolate and tan browns into a striking finale of black and charcoal. The closing looks introduce a new dimension of the brand, with subtle sequined suits and tuxedos featuring diamante button details, alongside fluid black and silver jacquard dresses. The in-house print, designed by Paul and William Costelloe in three colourways, marks their final collaboration before Paul’s passing. An enduring tribute to their shared vision.

For the third season in a row, the Paul Costelloe house has collaborated with jewellery designer PK Bijoux, whose sculptural, one-of-a-kind pieces repurpose vintage elements such as medals, chains and buckles, blurring the line between heritage and bold modern design.

“My father will always be my inspiration. Creating beautiful clothes for all women to dream and wear with pride and love. Thank you for all your support.” William Costelloe