If you invest in one coat this year, make it a peacoat. It will make virtually any outfit look dapper – especially if it’s navy. Look out for wool versions and, if your budget stretches, cashmere blends add extra warmth and softness. Take inspiration from the perennially stylish Justus Frederic Hansen and team yours with a thick knit, jeans and boots; or do smart casual with a grey hoodie under it. Here are three ways to style yours…