Jim, There is no “Achilles heel” so far as apps. There are tons of Store apps and more added daily. Admittedly there aren’t as many as Play Store or Apple Store, but there are a lot.
It's not that there's not a BBC Weather app for WP. It's that it's not allowed to be installed on my AT&T branded Lumia here in the U.S. for whatever reason unknown to me. It is not found in 8.x Store (here in the U.S.) neither, so therefore not allowed to install, again, for whatever reason. However, there are loads of other BBC apps available. Besides, I can add any location in the world to my Bing weather app or other weather apps so far as that goes.
It seems that I did find the BBC Weather app shown above in my 1st pic of post #27 via Bing search on my phone which opened the page results in IE in which one link led me to the Great Britain Windows app Store, which is what we see. Within that and scrolling left, the BBC Weather app publisher is a one Chesusoft. It seems they have no official website. I performed a Bing and Google search to no avail. Also on that page is a link to help. It seems they use a one “Uservoice” service for that, but that’s anoter subject.
Where did you get the information on the copyright?
So far as your “almost INDESPENSIBLE” rail app > Put this in your icon and smoke it.