[evolutionaryparenting.com/guest-post-breastfeeding-and-alcohol-consumption/
Think this is a reliable source, anyway I like what it's saying so I'll consider it good advice.
Although I seem to be on a breastfeeding break having finally weaned DC 1 2 weeks ago and DC 2 not due till March, just thought I'd share the good tidings if anyone was wondering about boozy Christmas lunches