Thank you for the advicewhen I first put him in the viv he hung out in one of the flower pots in the background and underneath one of the logs but he didn't actually discover his hides, although I'm now thinking they're too big anyway!
He just scaled the background and found the dreaded gap that I didn't think was big enough. First lesson learned there.
I've turned the light off now, I only kept it on in the day so that he would get used to it and for it to provide more of a day/night cycle. The room the viv is in is quite gloomy and doesn't get much natural light.
I'm also thinking about getting a motion detect camera so I can see if he does actually come out at night! But yeah, think I'm being a bit impatient. I'll leave him be for now!