I watched the series first time round. Even though it is ten years old or so, I believe it is still a valid record of an (assisted) build. I was intrigued by the fact that the aircraft did not appear to carry a registration.
It has been the habit of Keith Duddy, the producer to purchase the hardware in his programmes. The narrow boat "Dover" which was rebuilt by Alan Herd for similar programme is still, I believe, for sale at Braunstone Marina. So I would not be surprised to hear that G-OIZI was registered to the TV company. I note that on GINFO, the manufacturer is named as K Duddy. The same site brings up G-KIRB when an enquiry for G-OIZI is made. I think to call the show a "con" is a bit strong, but I am aware that Mr Evans recieved more than the usual amount of instruction. But it does give an indication of what is involved in the building of a kit.
I often wondered what happened to the helicopter which was another Mark Evans "build", anyone know?