Open Barn with glass pod bedrooms - Grand Designs (old episode)

[dbph 0]

A few years back there was an episode of Grand Designs that featured (I think as an example rather than the full build) a barn that in the main was not insulated and left very 'barn like'... Then the insulated and cosy living accommodation was built within - like glass walled pods. I remember the within the central space the kids could cycle round and there was an open fire for keeping it warm-ish in the winter. I'm trying to find more details about it. Does anyone remember this? Or know where I could find some images. Googling something so vague is having little luck! Many thanks!