It is surprising how little one can find on the Internet about it. I searched yesterday and could!n't even find the names of the victims beyond the fact that his wife's name was Heather.
I found an archive article froms News Limited of a news report at the time when he was about to go on trial
It did name the victims and how they died (one woman had escape the house and he chased after her before shooting her in the back of the head).
Think I used cliff batholomew murder as the search term.