In fashion you’re never more than 18 months away from a military revival. It’s the trend that never grows old; a look designers adore. Especially in London, where Christopher Bailey never fails to put a fresh spin on the Burberry trench. This Autumn/Winter Burberry’s military coats were quilted, with dramatic wide hips and nipped-in waists. The military look continued at McQ, and over in New York with Tommy Hilfiger, where army-inspired outerwear was accessorised with leather belts and knee-high boots. A lesson in flawless winter dressing…