Marks & Spencer is facing an uphill battle to hold its market share in the booming chilled convenience food sector according to the new Retail Intelligence research report Chilled Convenience Food in the UK. While food sales were less hard hit than clothing sales in the 1998-1999 period (during which the company's profits were halved), its chilled food market share is falling as competition with the major grocery multiples intensifies. With reduced footfall likely to have a knock-on effect to food sales, M&S faces a tough battle in the sector it pioneered in the 1980s and led as recently as 1997.