James Purdey & Sons may be best known as a giant of British gunmaking, but its outdoor attire blends the countryside-ready practicality with a classic silhouette to great effect. For this autumn, the design team has concentrated on the technical function of each piece, including combining innovative fabrics with the more traditional tweeds, cashmeres and wools for a blend of style and performance. This classy Mayfair raincoat is our pick, seen here with the rather handsome Purdey Sporter bag (£1,800). £425; purdey.com