It is true that the Bible strongly warns against being an alcoholic in many places. However moderate drinking is not alcoholism and God doesn't appear to be trying to tell us it's a sin since scripture never refers to any sin as a positive thing or a good thing.
I feel I need to mention a disclaimer here. I don't know your age and am not familiar with alcohol laws in the UK. I am NOT advocating breaking any laws, nor am I advocating doing anything that you truly believe is sinful!
There are many places the Bible talks about drinking alcohol in a positive way. If you do a study of all the references to drinking alcohol on the Bible, you would find that the vast majority of them associate drinking alcohol with happy positive occasions and blessings. The few warnings against it that can be found are either warnings against alcoholism (abuse and excess) or warnings against not taking the chance on it clouding your judgement in certain situations, such is if you are a king as mentioned by Questdriven. "It is not for kings, O Lemuel, it is not for kings to drink wine; nor for princes strong drink:" (Proverbs 31:4) More common in modern society I would think would probably include anything that is illegal, such as prohibitions in age laws and driving laws to name a couple.
Even in the case of the Proverbs verse, it still uses language that suggests a warning against excessive drinking rather than a complete prohibition of all alcohol. The New Living Translation translates Proverbs 31:4 as "It is not for kings, O Lemuel, to guzzle wine. Rulers should not crave alcohol." The words "guzzle" and "crave" seem to indicate it is referring to excess rather than a total prohibition.
The commonly used verse from the New Testament among many fundamentalists is Ephesians 5:18 which says "And be not drunk with wine, wherein is excess; but be filled with the Spirit;". While some claim that this verse prohibits all use of any kind of alcohol for any reason and even take it to the extreme of not even allowing rubbing alcohol in their houses for medical use (!), once again, when you look at the actual meaning of this New Testament verse in the context of the entire word of God, it can only be a warning against excess, not an absolute prohibitions. It even says "wherein is excess"!
I think a wiser point of view on the subject of alcohol is to consider Paul's words in 1 Corinthians 10:23 (ESV) "All things are lawful, but not all things are helpful. All things are lawful, but not all things build up." I drink alcohol sometimes, but (as with many other things too) always ask myself first if doing this will help, hurt, or make no difference in the particular situation. For example from my own particular life, I don't drink around certain people if I know they will look at me as a hypocrite or in some other way hurt my testimony with them, even if they themselves are drinking. I also won't do it if my reason is to "show off" that I can do it. These are examples of things that wouldn't be "helpful" or wouldn't "build up" the body of Christ. On the other hand, moderate drinking can be helpful in some situations, and in others it might make no difference at all. Your decision to drink or not should be very flexible and very dependent on the particular situation and the reason you drink, and in no case should it be allowed to become so important to you that it takes precedence over God or hinders your Christian growth or testimony. For many people moderate drinking is not a problem, but for some other people in other situations this could mean total abstinence. It's very subjective and, as in all things, I would recommend prayer and being open to the guidance of the Holy Spirit in each and every situation.