Big four UK grocers share of market to fall 4 pct by 2020 - Moody's

LONDON, June 11 (Reuters) - Britain's four biggest grocers, Tesco, Asda, Sainsbury's and Morrisons , will lose 4 percent of their market share by 2020 as fast growing discounters Aldi and Lidl continue to expand, Moody's forecasts.