In a somewhat surprising turn, New York Fashion Week has become a key staging ground for European labels looking to capitalise on recent momentum in America. New York generally faces perpetual questions about its place in the fashion calendar, when the luxury sector is so firmly centred in Paris and Milan. But over the next 10 days a host of brands from across the Atlantic will put in an appearance, including Fendi, Marni, Cos, Bottega Veneta…