Apples and pears could be the next food shortage in the UK, after it emerged that British growers are planting just a third of the number of trees needed to maintain orchards, saying their returns from selling to supermarkets are unsustainable.Ali Capper, head of the British Apples & Pears trade association which represents about 80% of the industry in the UK, said 1m new trees would have to be planted each year to maintain the UK’s 5,500 hectares (13,590 acres) of production.This year farmers had planned to order just 480,000...