Update: Tomorrow I will be calling the behaviourist to make an appointment for her to visit us and help us with a training plan. My partner and I have been very careful with both dog and child to keep them at a distance from each other. We have been giving big rewards to the dog when he has been relaxed around the baby which he is enjoying. The dog has also been having little breaks over at his friend's house (my parent's dog), and also getting out and about.
For the discussion about what has been happening- we did do preparation for the dog for the new arrival of the baby, which we sought from professionals. We also looked at how to settle them in together. This has obviously not worked yet. I think with the baby getting more active - crawling and now walking - he's been taken aback by her ability to move toward him.
We will be doing everything we can to help the dog with the baby as we see our dog as another family member. But for now, it's space, support, guards and love!