I have a sneaking suspicion that the longline vest is going to be one of the biggest trends for the season – either in a cotton/linen fabrication, or a suiting fabric. Think of it like the older sister to the waistcoat; a more demure silhouette with the modest high neckline. And the longer length feels a bit more flattering too, cutting off just below the hip. A fun way to play with proportions, and easily winterised if you opt for one in a more robust, flat fabric and add a slim knit underneath. Whether you plan to jump on board…