I had both my TVs on - looking at both the BBC [with sound] and ITV [with the Volume turned down]. The pictures were more or less the same during the service, which makes me think that the reason that the TV did not concentrate on showing the foreign royals is because the commentators do not know who they are and so would be faced with a dilemma if the tv feed they were watching presented them with close-ups of people they do not know. Bearing in mind the global reach of these pictures, even if space at commentary boxes is at a premium, my own very humble view is that perhaps it would be a good idea to have an expert on foreign royalty present with the commentators. Just my humble thought.
Alex