Forest bathing shouldn’t, despite its name, actually involve getting wet. But while the weather in Japan, where the practice originated, is more reliably warm, the same can’t be said for Britain. At least not in early spring. ‘I’ve never done this in the rain before’, says David Read, my guide. A crash course in forest bathing follows. So is it a gimmick, a fancy name for taking a walk in the woods? Or is Shinrin-Yoku, as it’s known in Japanese, worthy of all the fuss?