The Sunpipe (by Monodraught) is well known to many viewers of Grand Designs - and others. Interesting - but perhaps a bit pricey.
I now have a memory of a subliminal exposure to another similar product.
1 I *think* it was on Screwfix.
2 I *think* it seemed cheaper than a real Sunpipe.
3 Needless to say, I can't find it!
Any pointers?