From what I could see (BOTTLES unless specified) this included Brahma (12 x 330ml), Sol (12 x 330ml) Magners (6 x 584ml), Carlsberg (12 x 440ml cans), Kopparberg (6 x 500ml) Tuborg (15 x 275ml), Budweiser (10 x 330ml) Cobra (12 x 330ml) and Savannah dry cider. So any two cases of any of these.
Works out 50p a bottle for some of the beers.
Based on comments in this thread, it appears that these offers are not necessarily nationwide. This post is based on two visits to Tesco, Middlebrook, Horwich (Near Bolton) and each of these products is definitely in the offer until Sunday 9th August in this particular store.