Does he look ok? Still hasn't shed ??

[SRMD]

I may do some experimenting with a tub and heaters in a room, failing that I will have to stick with ceramic heat and provide a humid hide permanently I think

That could be the easiest solution you can buy exo terra caves that act as a humid hide they come with moss, also check out cork bark you can use this to fill your viv with they are big pieces of log good hiding places, when I bought mine i sterilised them and put them in the oven for 30minutes just to be safe.

You just need to add more decor and add places that you can see your BP so he can feel safe and maybe he'll start roaming around more.