ANYONE WITH A LONG-TERM GLUTEN INTOLERANCE will no doubt have noticed, and be heartened by, the wider range of gluten-free products that are available. Ready-made cakes, breads, muffins and scones are great for convenience, but often pricey – and it can be hard to find a truly healthy treat. Making your own delicious bakes can be cheap and satisfying, but how do you know which flour is right for your recipe?