Queen Camilla has pulled out of a number of scheduled engagement this week due a chest infection, Buckingham Palace has said.
No further details regarding her illness or treatment have been released but she is understood to be resting at home under doctors' supervision.
The Duchess of Gloucester will step in on behalf of the Queen, 77, at the annual opening of the Field of Remembrance at Westminster Abbey on Thursday.
A statement from the Palace said the Queen hopes to recover in time to attend this weekend’s Remembrance events.