How to make the world’s best barbecue this summer

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COOKING outside can be one of the joys of summer, but, like conducting an experiment outside the lab, it is harder to control all the variables – even if the weather is on your side.

A key question is which fuel to use. Charcoal is made by slowly burning wood in low-oxygen conditions. This drives off most of the water and other volatile compounds until the remainder – about 25 per cent of the original weight – is almost pure carbon, although some unburnt wood may remain in larger pieces of lumpwood charcoal.

You can also use charcoal briquettes. These are made from …

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