I'm afraid I've got my cynical head on today.
Cheap booze is sold from supermarkets, the majority of which close in the evening. The problems from binge drinking (drunkenness, anti-social behaviour, fights) occur when the pubs and clubs shut at midnight +.
Supermarket purchases are primarily for home consumption. The problems occur in our town and city centres.
A can of lager from the supermarket can cost as little as 35p, but you would probably drown first before it got you drunk. A bottle in a bar will be �3 but will get you drunk quickly.
The problem isn't cheap booze, it is strong booze.
There has been a campaign to stop supermarkets selling any alcohol.
http://www.telegraph.co.uk/news/main.jhtml?xml =/news/2008/02/20/ndrink120.xml
Tesco are now saying they favour a ban on cheap booze not through any altruistic motives, but because...
a) They do not make as much profit on that and they could blame a price rise on the government
b) It would hit their competition (BargainBooze etc) who are cheaper than them
c) It would stop an outright ban and a huge loss in profits