Bikini top by Matthew Williamson, Stretch swim fabric, Halter-neckline, Embellished design, Secure back fastening, Hand wash, 85% Polyamide, 15% Elastane, Our model wears a UK 8. The master of print and embellishment, London-based designer Matthew Williamson translates his love of travel into the brand�s signature laid-back, boho style. The result is a collection of pretty printed dresses, oversized sunglasses, beaded kaftans and cut-out swimsuits.