That's not the case, because the main BBC websites (e.g. bbc.co.uk) serve the same content to UK and non-UK visitors, with adverts showing to the latter, so the

That's not the case, because the main BBC websites (e.g. bbc.co.uk) serve the same content to UK and non-UK visitors, with adverts showing to the latter, so they could easily do that on this site too.