Definitely the 1980s Sloane Ranger look, complete with Burberry umbrella before Burberry had any hint of chav. All tweedy browns for the county look. Lean casually against a gate and take on the air of a cavalry officer at home on his estate. Of course, it wouldn't work at all without the epaulettes.
There again, you could leave out the manly shoulder detail and make it in bri-nylon.