I am delighted for the Queen that she has had an Easter visit from her grandson, I know I relish every moment spent with my grandchildren. We are led to assume by the media that the Sussex children were not with them. As it is also reported that the Duchess is only staying at the Games for a short period, it is perhaps understandable why they are not accompanying their parents.
Doubtless information about protection officers being nearby whilst they walked in the grounds will soon be confirmed in due course. as they appeared to be close to a coach containing members of the public, None of us know what has changed, or who said what and why, so it is pointless speculating.