At the moment I have some old tyres and a black bin full of water to act as temporary heat sinks while Jerry works on the plans for a solar powered heat sink. So I just have a few frost sensitive things in at the moment (strawberry, avocado, tomato).
For a pictorial tour of the construction and the insides of the greenhouse look at the photo gallery on our flikr site:
http://www.flickr.com/photos/nigeandgabs/sets/72157600362382717/