(Since I can't edit that post anymore, what I linked to was a bar graph showing how many minutes of work it takes to earn the sum needed to purchase 500ml of beer in various countries, based on 2011 retail prices and national median wage.)
I was just in Alaska for the weekend, and we bought two 24 packs for the price of one back in Canada (and Canada is a little cheaper than Oz). Hard liquor is less than 1/2 price.
In a bar, beers were $2 that we pay $5-$7 for in Canada.
If so, comparing the price of this delivered beer in the uk to the price in America is meaningless.