Sir; On Tuesday industry leaders met at 10 Downing Street to discuss the future of UK agriculture. But will action be taken about the UK pig industry? In December 1997 it stood at 805,000 breeding sows. Following the parliamentary decision to ban stalls and tethers (unique to the UK), the imposition of a BSE tax of £5.26 on each UK pig, a strong currency and ruthless buying pressure from supermarkets, it is anticipated there will be less than 300,000 sows at the year end. The industry will not return so this country must now rely on cheap, dubious imports. The pig industry is not alone. Many other sectors of UK agriculture are heading for the exit. Robert Persey Upcott Farm, Honiton {{LETTERS }}