Charles Tyrwhitt Men's Slim Fit Wool Rich Stretch Suit Jacket - 40REG - Navy - Available at M&S

Appreciate the comfort of this wool-rich suit jacket from Charles Tyrwhitt, crafted with a touch of stretch. It's cut in a slim fit for a modern tailored silhouette, with a lapel collar and a two-button, single-breasted front. Double back vents allow easy movement, while two flap and one breast pocket make room for essentials and a handkerchief.