A Brexit dividend, at least for dogs: Meatly, an artificial meat start-up, has won UK regulatory approval to sell pet food containing a lab-grown chicken variant. The company's launch product takes cells from a chicken's egg and feeds them minerals, vitamins and amino acids in temperature- and PH-controlled containers. The environmental boast is that this uses 64 per cent less land and 28 per cent less water than raising live chickens, and no antibiotics or animal products other than the original cells. It also spares the UK's watersheds the polluted run-off from chicken farms that has killed off wildlife in rivers like the Wye. The political boast is that approval would have taken much longer in the EU, where lab-grown meat is still confined to labs. Meatly hopes to make samples available by the end of this year and to be producing pet food in industrial volumes within three.