Hi guys, thanks for all your input and replies....
He has been toilet trained since he was about 10-11weeks old.... He hasn't done a wee inside until 2 weeks ago and now he has done it every 2 or 3 days.
I have him pretty much wee on command outside since he was a pup so he knows what to do... I think the most accurate comment is that he may have "matured" and wanting to mark his territory.
He is not desexed, reason being is the breeder we got him from may want to use him in her breeding program down the track. He is from one of the best bloodlines in australia, within the show scene. If he is not used, I'll definitely love to get him to have a litter and keep a pup. He is the best, we'll natured dog that my partner and I have decided we want our future dogs to be a product of him
Thanks again for all your suggestions I think I'll just have to as most have said, pretty much toilet train him again in a sense
Daniel