That may well be true in the UK. But here in NZ I don't need heating (or cooling). I probably turned the heater on less than 10 times in the last year. The supply charge for gas (even if I don't use any at all) would cost more than my entire heating bill. If I have gas water heating, the electric power company has nothing they can turn off at peak times, so they will charge a higher rate for all of my power.
The video is somewhere on a backup CD somewhere. The pipe was plastic. To seal it they just bent it in half and put some duct tape around it.