Seven months into one of the retail world's toughest jobs, Carrefour CEO Lars Olofsson this week detailed his plans to drive growth at the French retail giant. Across the English Channel, another food retailer in difficulty, Marks and Spencer, saw its quarterly sales fall - but the result was an improvement on the previous three months. M&S, meanwhile, would have been one of the world's retailers interested to hear that India's finance ministry has recommended a loosening of rules governing foreign investment in the food retail sector.