I wrote to Heather @ Midwives-exclusive and this was her response:
Midwives are hightly trained and skilled to assist with natural birth whilst Gynae's at highly trained and skilled at doing high tech interventive birth. There are some gynae's who don't want to work with midwives but generally the feeling is pretty positive. Over the years I have fostered some really good relationships with excellend gynaes who are very pro and supportive of women birthing naturally with a midwife.
If you are considered low risk i.e.no major health risks or serious pregnancy complications then you would be a candidate for midwife led care.
We do work hand in hand with some of the best Gynae's in Pretoria (I've worked along side them in a team for the past 15 years).
How it works is:
You see one of us back up Gynaes for the 12 week sonar (Dr Paul Swart, Dr Sultana Sulliman or Dr MC van Aard)
At this stage you inform them you'd like to follow the midwife route and we referred you to them.
At 16 weeks you see the midwife for your first consultation - this consult takes around 45 minutes and includes a full history taking etc
At 20-22w you have another sonar (Fetal assessment sonar) either with the gynae or with the Fetal assessment specialist (who is also a gynae who specializes only in sonars) (Dr Nerine du Plessis or Dr Somo Pillay - both at Femina)
From 24 - 26 w onwards you follow up with the midwife through the rest of your pregnancy.
If we pick up a problem or are concerned about anything we simply contact the back up gynae who you've seen and refer you back to them for assessment.
Sonars are only done 2 - 3 times during the pregnancy and there is no medical reason why you should need more than those sonars. If however you do prefer to have more sonars you can see our sonographer at the practice who does lovely sonars and really takes her time.
The birth:
When you go into labour you contact your midwife who by that stage you'll know really well and hopefully trust completely. She'll support and guide you as to when you need to go to Femina's birth unit. Once you've decided when the right time to go in is she will meet you there and support you throughout the labour and birth.
As you get ready to give birth a 2nd midwife will come in for support.
There are always 2 skilled medical people at a birth.
We only call the gynae in if it becomes necessary for a c/section or instrument birth. (there is a 15 % chance of this).
As we have worked well for many years with our back up gynaes they are really comfortable working within the midwife led care team.
I would highly recommend you come in, see the birth unit at Femina and also meet up with one of the midwives working at my practice. We offer free information sessions to women who are looking at their various options for birth. If you'd like to do this please phone Yolandi 0123293865 to set up a time that suites you.
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I found this very informative and she answered all of my questions.

Thought someone else might find it useful too.