The solution, which is every bit as simple as it sounds, is the sundress. The only sensible purchase to be made during this tricky little interlude, and the joy of such a breezy wardrobe addition is that it never dates. A companion piece, set to be dug out of drawers and suitcases during the balmy nano-second we know as the Great British Summertime, this dress has proved irresistible to every woman I’ve ever met. And rightly so: after all, whether you wear a navy jumper and jeans all year long or not, a sundress — in whatever form you desire — is the wardrobe equivalent of a gallon-load of optimism. In fact, when chosen wisely, the sundress is practically wearable melatonin.