Would not recomend drinking the cask stuff as it gives you a major headache. It is about BD 7 for 5 litres in the booze shop.
For normal quaffing (about 12 bottles a week) I buy Maison Calvet from BMMI. It is a French Table wine and very drinkable it retails at BD 1.9 a bottle but if you join BMMI Premier club and buy it by the case you can get it for BD 1.615 (15%) a bottle which makes it very good value.
There is a good range of wine with a bottle of French Chablis about BD 10 and Mouton Cadet at BD 7
Bottoms Up