As I said above, Prince Charles speaks publically about global warming all the time, which is a political issue.
https://www.youtube.com/watch?v=lR3ad7cyFIQ
Hard to tell what’s going on. Looks like Trump arrived exactly on the hour, so I suspect that was the time. Looked for a minute that they had the Queen waiting for them.
Would have been cool, if she was holding a large Trump balloon.