Looks great! Can I ask a question?
I heard of a method of construction whereby you build your house out of hollow polystyrene blocks, and then fill them with concrete to make the structure. From the photos on page 1, it looks as though that's what you've done, am I right? If so, how does it work, and what did you think of the process? I believe it's still a pretty new idea to the UK, but I've heard of a couple of folks planning to use it.
Cheers!