I had understood that several PBS stations had purchased the rights to show BBC World news and that is why BBC-America created BBC World News America. I am not positive of this though. It was a rumor I heard at a local PBS. I do however know that PBS stations who purchase BBC programming pay a fortune for it. I have seen the local PBS's invoice for Vicar of Dibley and although I don't remember the price, it was an OMG moment.
In other words, I am not certian that the BBC hasn't already sold the rights to World News in the US to various PBS stations and is making a lot of money from it.
The one (or two) BBC World Newscasts plus BBC Wold News This Week, are all "produced" provided by KCET, Los Angeles for airing by local PBS stations as part of the "Extended" programming service--meaning NOT a PBS (National Programming Service) offering. This in no way limits BBC World, as KCET does not have (nor the previous provider, a different local station, and never had)
exclusive rights. BBC World, specifically Discovery Networks retain all rights in the U.S. regardless of KCET's limited distribution rights for public TV.
As for your insights about the Vicar and other British programming, much of it, the Vicar included (Keeping Up Appearances, et, al.), is also "Extended" programming--meaning NOT offered by PBS, but by 3rd parties, and they are free to charge what they want and local stations are fee to pay what they want. Such programs are SEPARATE and beyond the cost of airing the PBS National Service Programming which includes the rights to all PBS offered programming included in the local stations annual dues payment.
I have no doubt the Vicar was pricey, as these BBC shows are highly popular with the local PBS audience. The stations feel that they come out ahead during the fundraisers even though a show like the Vicar costs big $$$. BTW, BBC makes more money offering it to stations outside the PBS national service (contracts station by station), that is why PBS offers fewer of the BBC's programs than it used to.
I should add that these 3rd parties use the PBS TV satellite distribution service to deliver the programming to the local stations, and YES, the 3rd parties pay PBS to do so.
It may interest you to know that during the 80's, A Prairie Home Companion was by far the most expensive public radio show for purchase. Well, Garrison Keillor made a ton of $$$ for the local stations, but as time passed and the price for the right to air the show increased, some stations actually dropped this perennial favorite because after the fundraisers, stations actually lost money, and they didn't like Minnesota Public Radio's heavy-handed tactics. APHC was
never an NPR offering, but rather an "extended" program service offering that made Minnesota Public Radio a power in public radio and that begot American Public Radio that begot . . ..
One way for people to know if a program is part of the PBS National Services is if, at the end of the show, the PBS bumper/outtro "This is (or I am) PBS video logo plays. If it doesn't, then that show was quite likely offered by an "independent" producer.
Extended programming is actually encouraged and was always a part of the PBS and NPR plans to allow stations access to "independent" producers programming and vice-versa, in the belief that it fosters diversity and an audience for programming that just doesn't fit the PBS National Service programming. Some of the best and, certainly, controversial programs do come from the 3rd parties. Although, now, it seems just a big money maker for BBC and others.