A good friend once said to me that Art Nouveau was all about summer – pretty colours, swirls and florals, but that Art Deco was Winter – a stark palette of black, white, cream with a few bright primary shades thrown in. I would take the metaphor further and say if Nouveau was day, then Deco was most definitely night. And maybe that’s what makes Art Deco styling so perfect for glamorous festive evening wear. Next have taken the Deco trend that has been such a key story in recent seasons and have reinvented it for Winter 2012. Taking all those stark, contrasting colours – the black and white, or…