Who won Christmas? It’s a lot easier to say who lost: Asda’s shocking 6.5% decline in the four weeks to 27 December [NIQ] shows the Leeds supermarket is in real trouble, having failed to convince shoppers that improved price competitiveness is enough. It’s come out this week with another price pledge, but is anyone listening? It seems Asda is in danger of tilting at windmills, as Ken Murphy confidently declared that Tesco is “marching to its own tune” this week. When Asda kicked off a price war last April, Murphy’s caution on profits guidance spooked the market, but this week’s trading update advised they will be at the upper end as its market share inches back to 30%.