I followed the guidelines at the time, which were no alcohol during 1st tri, and no more than 1-2 units once or twice a week thereafter. I actually never went further than 1 small glass of wine/champagne on special occasions, so i was well within the limits.
I think that you'd be perfectly justified in having a glass of wine, but I wouldn't go further than 1 glass.
I wish I'd been one of those women who didn't miss booze during pregnancy. I missed it like mad! The only good bit was that I completely lost all tolerance for alcohol, so when I had my first post-baby glass of vino I felt utterly hammered after a couple of sips! Itw as like being a teenager again!