With every finger (and sock-clad toe) crossed for warmer weather ASAP, make a lightweight denim coat a new-season priority – perf for channelling casj-cool 70s vibes, your daytime and going out wardrobe is so ready. See how Paris Fashion Week designer Vanessa Seward owned it on the SS16 catwalks, Behati Prinsloo bossed hers, and the style to bag that blue-jean swish.