We're all prone to going for the cheapest option when it comes to buying our booze, but what effect is it having on our lives and the world around us? Antony Barnett tackles this issue in the lastest Channel 4 Dispatches, examining 'the true cost of cheap alcohol' and asking if supermarkets shelling pints cheaper than bottles of water, the culture of 'pre-drinking' and the booming drinks industry are contributing to a rise in alcohol-related crime and violence which is happening around the world.