MawtheMerrier
NotAGran55
I think she has gone 
You may well have been right - or at least close NotaGran
Liz Truss was informed of the Queen’s death at 4.30 and as PM it would have been very shortly after the event,
It explains the grim faces of the Royals who arrived from Aberdeen, I do wonder if they were there in time .
Along with the grim distant faces I think the fact that they travelled by car from Dyce and not helicopter also indicated that they were too late.
They were alone also without a driver or security , giving them privacy, which would be most unusual.
Harry also appeared to be wearing a black tie too…