So far so good, the last two nights have hovered around zero degrees C and the heater has done the job admirably, but I suspect that it may struggle at minus numbers. Time will tell.
Condensation and damp has failed to make an appearance, even with the plastic walls, so I'm proclaiming this a win.
The garden has been very quiet this year, not so much hooting, squawking or general shuffling around, well apart from the squirrel who decided to soak up some rays while sitting on the windows of the crown cover, made my day that did.