Plus you can accessorise! Last weekend, on a whim, I bought myself a vacuum flask, the upshot of which is that I can now carry a whole litre of hot, sweet, milky tea in my backpack and have a little of cup of it whenever I feel like it. That, to me, is luxury… a whole world of comfort and practicality within reach of anybody willing to let go of their fashion credibility. I’m already putting serious thought into my winter base-layer — thermal tops, long johns, the lot — and honest to God, I’m only half-ironically toying with the idea of using walking poles on my walk into work and wearing a head torch in bed. Am I, increasingly, dressing like a Scout leader? Yes. Have I ever been happier? Honestly? No.