This is all very interesting, but what about the role issue of the specific machine.
News organisations are about putting words and pictures together, ideally first, ideally live and ideally for extended periods of time.
This I imagine is one reason why the Police and some organisations have gone down the Twin route....for a 1 minute shot they get 1 minute of the subject matter they are interested in, rather than 15 secs of that, and 45 secs of the back of a building that is of little interest while the aircraft keeps up an orbit at suitable speed.
As we know some of the most filmed tube stations in London are stuck down some pretty tight streets....