Okay, these are stubbie bottles and it's only 4% ABV, but it works out incredibly cheap at 62p per litre / 35p per pint.
This is much cheaper than any of the similar packs of bottles of imported lager in Asda or Tesco. It isn't advertised as a special offer, so there is no expiry date.
For comparison, it is also quite a bit cheaper that the current Sainsbury's deal of 15 x 440ml cans of Carlsberg for £7. That deal works out at £1.06 per litre / 60p per pint.