Overall shop prices reported deflation of 1.9% in May unchanged from April. Food reported annual deflation of 0.9% in April for the third consecutive month. On a 12-month average basis, the Shop Price Index reported deflation of 1.8%. Non-food deflation remained at 2.5% in May. LONDON, 2015-6-3 — /EPR Retail News/ — BRC Director General,…