Yesterday Jancis alerted bargain hunters to Sainsbury's offer this week of 25% off all wines and champagnes if you buy six bottles.
Today Waitrose goes on the counter-offensive with a similar offer: 25% off the total price of six bottles or more of wine, including champagne and fortified wines, 4-11 November.
See here for my recent tasting notes on around 150 Waitrose wines.