I have a hell of a lot more to lose than you, but this is what I've found:
I started dieting in November (low carb), but kept up my half-bottle of red on a Friday night habit. Not every week, but most weeks. I lost some weight, but was finding it hard work. The scales wouldn't really move for the first half of the week, and then by the time Friday came round again, I was down a pound or two. Then repeat...
I started again in January - low carb, and dry January, and it has been SO much easier to shift the weight, and it's coming off far more consistently, with no 'start of the week slump'. So if you're really wanting to shift the stone, I'd recommend it .
As a rough calculation (with some numbers I picked up off the net) - allowing 180 cals per lager, and 300 cals for half a bottle of red - you've looking at drinking nearly 2500 cals over a weekend - which almost like eating an additional two days worth of food on your current diet. I'm not a nutritionist, or by any means an expert, but I think that's bound to be having an effect.
Well done on recognising it might be having an effect, from my experience, I'd definitely recommend giving it a miss for a while. Good luck
Alcohol has three things against it, as far as weight loss is concerned:
1. calories (wine and lager are both high in calories compared with spirits, which you haven't mentioned!) 2. carbs (lager especially is high in carbs) 3. fuel source (the body is very lazy and alcohol is the easiest source of fuel; it will burn this in preference to anything else)
So it doesn't really matter what diet you're trying to follow - sadly alcohol really isn't going to help