I found out about them by asking... I had bad PND with DD1 and when I recognised the warning signs when I was 6 months pregnant I told my middy that I needed help and she got in contact with them. It made a huge difference and so far, fingers crossed I haven't got PND.

I guess if the midwives don't work in delivery often they may not know about the options available. I spoke to the head of the delivery ward about my options. I was really really proactive due to my first birth experience and I think they appreciated me asking lots of questions and making sure I got help when I needed it. Keep asking, it doesn't hurt and it may make all the difference when you go in to have your baby.

Feel free to PM me if you want to know more or just want a chat!