A treehouse in Wales

An uncommon treehouse in Wales.This treehouse in Wales (UK) designed by the architect Peter Canham is quite uncommon, the shape remind of  a wooden roulotte with two circular windows to look at the surrounding landscape. Moreover almost in a corner a small element, maybe the toilet? Both are lying on a platform suspended from the ground and anchored to the trees. The only way to reach the platform is from a spiral staircase.

I would like to know more about this treehouse, it could be that some recycling materials were used, or at least the railing seems so.

I have to say that in my opinion the treehouse has an interesting shape, but the small element on the left and railing are using another design -in the architectural field, we say another language- and I think that this take value from the house off.