Just seen this in the paper. Berberana Carta De Plata Red and Berberana Carta De Plata White are better than half price at £3 per bottle. No need to buy 3 to get the deal, buy 1 or as many as you want.
I am a wine drinker and I KNOW THESE SUPERMARKET WINE DEALS are normally trashy, disgusting wines but the red is very smooth and pleasurable to drink, can't say I've tried the white but will be doing so now.
This only seems to be in store, not online.