What has McCain go to do with the UK?
Nothing, but that's the sole factor in how the news agenda is decided. A lot of stories don't have anything to do with the UK but that doesn't mean they're not interesting or significant enough to make the news.
The funeral was an interesting and unusual event.... unique in fact. It's not everyone who's respected enough to have the last three US presidents attend, and speak at, their funeral. In the end it turned out it also had a wider political angle, the subtext of a lot of the eulogies being seen as a dig at the culture created by the current president.
That said I doubt it would have got as much live coverage on the news channels had it been a weekday and not a quiet Saturday afternoon
623058 and London Lite gave kudos