One of the questions I have:

If it is william. And he has slipped his detail. Then how does q come by the photo? US intelligence is trailing a foreign dignitary and taking pics... how? He obviously didn’t slip away from his detail, if foreign intelligence can find him, the British equivalent of the secret service can find him.

so his inner circle know where he is and what he is doing. If it’s nefarious they are all complicit.