Hi all, thank you so much for the replies.
The inside surface is floorboards, so while it's not a prefere place its not a nightmare either.
The good news is I've had a lot more successful trips outside. Aside from accidents last night while he was in his area (his first night sleeping alone) he has gone outside.
I have been repeating "go toilet" every time he is in the process of doing so and always praising him heals afterwards.
Further more the two dogs are getting along nicely now that they are more used to each other. Found them down the side of the house today sleeping with each other.
He has ever started to meet the cat today and given how timid the cat is that's a pretty huge deal.
As I type this up I'm watching a movie with Jedi sleeping at my feet, Louie sleeping on top of his scratching post and Rex just outside the door sleeping as if waiting for Jedi.
Haven't got Jedi sleeping outside yet, he isn't used to being left alone too much yet so easing him into it during the day
Thanks again for all the advice. The lil man and I will learn together