Swimsuit by Matthew Williamson, Just add water, All-over print, Plunge neck with notch, Non-padded cups, Adjustable straps, Low scoop back, Brief cut. 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.