1-2 units once or twice a week after the first trimester (or more like from 5 months onwards, wasn't that bothered prior but probably had the odd glass/bottle of beer in that time).
I was in France & following the advice at the time - after 7 months I was told to have a glass of red wine with dinner to 'help me relax'! This was 15/16 years ago, I've got no idea what their guidelines there are like these days. I never got drunk, or smoked & my kids are very bright, healthy and completely fine, obviously I only have my own personal experience to go by. I also followed Dr Jack Newmans advice on drinking whilst breastfeeding (he doesn't tell you to do it - he just explains that it's ok in moderation...).
I have a midwife friend who was taught at college that the zero tolerance of alcohol guidelines are there basically because some people are too stupid to be able to follow the 1-2 units guidance so they go too far - it is far easier to say 'have nothing' to everyone and minimise the overall risk.
Is there any scientific basis that anyone is aware of that shows actual damage to a child from following the previous 1-2 units once or twice a week advice (genuine question - not goady I promise!). One I have seen is this (which in summary says - we have no idea...):
blogs.bmj.com/bmjopen/2017/09/11/evidence-for-potential-harms-of-light-drinking-in-pregnancy-surprisingly-limited/
I'd say OP that you shouldn't worry - just be careful on the size of your glasses (ours now hold 250ml - one third of a bottle, so 'two glasses' is actually 2/3 of a bottle - however a 'glass' is theoretically 125ml, which was what I was sticking to when doing my 'one of two' glasses, the units change quite dramatically depending on the size of the glass - again, don't worry but perhaps be aware moving forward..)