Bikini top by Matthew Williamson, Just add water, All-over print, Halter neck, Tie front and fastening, You're in control, Clasp closure. The master of print and embellishment, London-based designer Matthew Williamson translates his love of travel into a collection of beachwear. Defined by laid-back, boho styles, MW by Matthew Williamson offers a range of pretty, printed cover-ups, beaded kaftans and cut-out swimsuits.