The designer: Dubbed “D4” and inspired by a recent trip to Moscow, Peter Dundas’ fourth collection for his eponymous label channels the gypset sex appeal that defined his tenure at Cavalli and Pucci.   This season it’s about: Peasant blouses and billowing silks (‘70s glam is his signature) meet strong shoulders and body-con (hello, ‘80s revival). The embroidered velvets are incredibly opulent, from a tailored smoking jacket to a floor-sweeping ochre gown.