December was Asda’s 22nd consecutive month of decline Asda has suffered a bleak Christmas after its market share slumped to a fresh low. The retailer’s market share fell to 11.4pc in the 12 weeks to Dec 28, according to figures from industry tracker Worldpanel – the lowest it has been over a Christmas period and the worst on record. The slump came as sales at the grocer tumbled by 4.2pc, according to Worldpanel figures. Asda was the only major supermarket to suffer a drop in sales over the festive per ...