"I suspect we'll know in the next, oh, half hour or so. If it's serious enough to warrant taking all evening, he'll send for me, as it will also be serious enough to warrant the Queen's attention."

In which case, they'll likely both miss dinner.

"And, yes. I noticed everyone was very drowsy in the nursery this evening. A day out tends to have that effect. They should sleep well tonight."

Whether their parents are working through it or not.