I've been your friend. I did not have a physical dependence on alcohol, but I had a psychological one. I also didn't drink every day (maybe every 2 - 3 days), and I don't drive or have children to be responsible for.
Therapy is what helped. Actually, after several years of therapy a different therapist picked something up that no one else had - that is what helped. I found the underlying cause of why I was drinking. This was coupled with another therapist showing care and compassion.
I stopped cold turkey (not advisable), but I had all of the vitamins that I would have had in an inpatient programme. I was lucky that apart from feeling physically and emotionally horrific I didn't have any life-threatening symptoms.
If she is drinking heavily, she should be taking B Vitmains for starts (and a good multi vitamin). What is her eating like? Starting by eating in the evening really helped me. I used to always have a milky drink too (in fact I still do). So I will have a protein and veg meal and then I will have a smoothie say with banana, peanut butter, and milk. Caffeine was an absolute trigger. In fact even now if I drink a coffee it is the only time my cravings come back. That and when my mental health / anxiety spiral.
If people had reported me to work, the police, social services etc. it would have just made me feel much worse, and ultimately made the problem much worse. Personally, I would not advice this route unless there are concerns (like immediate, life-threatening concerns for her daughter). I can't speak on the driving thing as as much i would like to think no one drink drives I've worked in a rural pub and know that she is not the only one doing it. In terms of her daughter, is her other parent aware? Is her other parent supportive? She will already by aware of what is happening, and as long as she is safe (minus the emotional harm) then this will have been the same situation that has been ongoing in her life for a while.
Our local alcohol services wouldn't take me as I have a mental health diagnosis - I had tried to reach out several times, it was very, very stigmatising and very, very upsetting.
How much support can you offer her? If she went into a treatment programme would you be able to support her through it? Would you be able to go and cook her a meal in the evenings for instance and just be with her during the first few weeks?
Re. being a midwife, I would be very surprised if her workplace were not aware of this - firstly the smell, secondly, the physical symptoms. I'm not sure what I would advise here - again losing her career may have a massive impact on her, but there could also be a huge risk to others depending on whether she is going in drunk. Can you call the NMC for advice? Or a nurses support line who maybe able to tell you what will happen and whether there's support specifically for nurses outside of the NHS support lines? It's unlikely she will want this on her nhs record which may also be preventing her asking for help.
Things can get better, you sound like a lovely friend.