If the BBC opened up all their content online and then instead of using geoblocking, used geotargetted ads
There are minor outlets of the BBC that use adverts - they were annoying me in Turkey a couple of weeks ago - but the BBC as a corporation doe not do broadcast advertising. They do have appropriate infrastructure for trailers and internal advertising of next weeks Downton Pigs or Vetbum Abbey, which is probably coordinated with the advertising breaks on their affiliates international broadcasting. But for their core market, the BBC does not do adverts. That's why their more recent programming has included a 10-minute segment in at the end of each hour of programme time with things like "making of Dances with Whales" or "Being Eaten By Cats - camaeraman's diary" : it provides chunks of programming that can be detached from the editorial stream (maybe broadcast later) and frees up 10 minutes of screen time per hour for soap adverts.