Someone knocked on my door and I foolishly opened it.
The man said that the heatseekers were photographing houses and would I like a new window.
I sent him away as when I can afford all new windows I will get them. And from where I choose not some cowboy who knocks on doors but I did not say this.
Anyway I looked up about heatseekers and they are indeed real but I could only find a news story that they are in Hampshire not in Furbyshire.
Their cunning plan may not even work as if people don't have the heating on it can't leak out the house can it, so they wouldn't be the wrong colour on the heatseeker map.
A man once knocked on my door and offered me all new windows. I said 'but my house is only six months old'. He said 'the industry moves quickly, there have been vast improvements in window construction lately.'
Amazing. Just like IT. Oddly, the prices don't tend to fall as they do for IT products ... what incredible chutzpah!
The nerves of steel, brass neck and iron in the soul of the door-to-door salesman on his mettle! 
It's strange isn't it? UPVC in landfill will stay there for 1000 years but make your windows out of it and in ten years it's past its best and needs replacing, squire.
I think they could just wait for the snow and send some regular cameras round to check on the loft insulation.
Except that they would miss the furby house because the snow stayed on my roof as I don't have much heat upstairs to escape out the roof.
At Darkes Farm in snow we were the only house around with a completely clear roof - this is because our loft insulation was non-existent except for blackbird corpses padding the between-rafters and all our expensive heat was zooming straight up there and making off into the atmosphere.
People coming to view DF sneered at the UPVC windows we had had fitted at vast expense but believe me it was better than having to patch rotting window-frames year after year with paint slapped onto gaps in a vain attempt to keep them together a bit longer. I was so happy to get UPVC windows, it looks OK, needs no maintenance, lasts for years, and seals in warmth. But stylish trendy people have to be revived with smelling salts pressed to their dainty noses at the sight of them.