Just a small update in case some of you wanted to know what happened to the snake. Well the last I saw of it was when it slithered under the fence towards the neighbours house. We couldn't spot it again but after a 'yell out' from the lady at the back house yesterday it was 'found' again.
This time the guy from the National Parks was able to capture it. He commented that it looked a bit underfed. So then he kindly took it back to the bush a few streets away and released it into its new home.
The Kuring-gai National Park is around 150 square kilometres, plenty of bush to play in so why they choose to come around houses is beyond me.
All's well that ends well.