Glad my guess on breed was accurate at least!
Right, so here is the plan...tomorrow, when it's colder, I'm going to carefully move him, without waking him if possible, to a different container. I have a large, solid, cardboard box with straw in it - though I could fill with topsoil, or I could get a something different???
I can move the box outside, to a cupboard near the house, insulate and hope for the best. Or I can put him in an unheated room for the time-being. Or, I can order a mini fridge for him and set at 5 degrees.
Are all options acceptable? Would one be preferable?
Gonna miss the fella for the next 5 or so months