Tate Modern’s cavernous and spare Turbine Hall was the backdrop for Matthew Williamson’s polished and sophisticated collection that featured pared-back daywear and a flood of fancy getups for evening. Skinny trousers with ikat prints, loose and flowing silk shirtdresses with buckles and patch pockets, and cropped jackets with little seashells dotting the neckline is what the designer’s gal considers keeping it simple. But she certainly doesn’t hold back after dark. There were cocktail dresses galore with beading, embroidery, lacework and feathery hemlines. Williamson also worked abstract blossom and Tokyo cityscape prints into floor-length numbers, some of which looked as if they had been doused with tiny buckets of orange and green paint.