The Christmas Price Watch showed little change across all categories and retailers this week. Asda dropped the price on 24-packs of Stella Artois by £1.00, below Somerfield and Tesco. Sainsbury's introduced a competitive deal for Hardys Stamp at £3.97, down from £5.77, bringing the price in line with Morrisons and Tesco, possibly in response to the 40% off voucher promotion used in Thresher stores last week.