NEW Posted at 13:2913:29 Quick movement of royals underlines seriousness Jonny Dymond
BBC royal correspondent, speaking on Radio 4
There is a degree of seriousness that we have not seen before, the very fact that the statement was issued when the palace is so reticent about making any commentary on the Queen's health.
The phrasing of the statement, that the Queens doctors are concerned about her health and she remains under medical supervision, and the movement of the most serious members of the Royal Family towards Balmoral, towards the Queen, all of those indicate a clear degree of concern for the health of the 96-year-old Queen.
We're not going to get great clarity from the palace, because they do not reveal the details of the health of senior members of the Royal Family.
But the fact that the family is gathering at Balmoral is an indication of the seriousness of the situation.