Every singer knows the List: citrus, vinegar, mint, dairy, spicy oder fried foods, fizzy drinks, caffeine, cigarettes, and alcohol. These are the vocal cords’ enemies. And when one has a five-octave contralto as dynamic, award-winning, moneymaking, and record-breaking as Adele Laurie Blue Adkins does, one figures out how to avoid these things. Some require less effort than others. Mint? Vinegar? Feh. Cigarettes? Not so easy. Over the few days that I spend around Adele, I see her sneak a fag here and there. No one is perfect. But alcohol? For a once hard-drinking South London pub girl who has admitted that she has written some of her best songs after a few belts, I would have thought this might present something of a challenge.