Ive never heard of Tweddle either.. what is it?
basically a family stay service where people experiencing problems with their children (or their parenting as many of the cases REALLY are) can go there and stay a few days and learn how to cope. They help with anything from sleeping disorders and the likes through to coping with full on disabilities. A lot of it is training the parents not to inadvertently encourage bad behaviors through their own actions. They do fantastic work and really help to keep families together when struggling with young children. I'm guessing there's something similar in most capital cities. My SIL used to work for Tweddle.

FWIW - it is the first result if you google "tweddle" - that will give more info on what they do.