Gilets

Transitional weather is their sweet spot, spring and autumn when a full coat is too much but a jumper alone isn't enough. They're also brilliant for layering under coats in proper winter. And in air-conditioned offices where the temperature can't make up its mind.

Something with sleeves, that's the only real rule. A roll-neck jumper, hoodie, flannel shirt, or long-sleeve tee all work. For a smarter look, try a tailored gilet over a crisp white shirt. The layer underneath is what sets the tone of the whole outfit.

On their own, they're best for mild-to-cool weather. The real trick is layering a down-filled gilet under a coat, it adds serious core warmth without bulk on the arms, which is especially useful if you need freedom of movement. Think of them as a temperature booster rather than a standalone winter piece.