If you want to loose weight- you have to stop drinking alcohol altogether. Not just lager but bacardi too. Vodka , wine, whiskey...all of it!. All liquor causes weight gain. If you stop drinking, you'll have a smaller waistline in no time. And definitely by July.
Cutting back on pasta and soft drinks would help too. Everything in moderation is key but NO ALCOHOL of any kind.
By the way, this is making me hungry....... for a Double Decker!
Remember them? The odd but fairly substantial sized chocolate bar. Despite never seeing anyone buy or eat one of these EVER (aside from myself and perhaps my brother), just about every vendor that sells Mars Bars, sells Double Deckers too. Strange.