The Queen will say she is "deeply touched" by the "selflessness" of medical staff fighting the Ebola outbreak in her annual Christmas speech.
Doctors and nurses from the UK and other nations have volunteered to help countries such as Sierra Leone combat the epidemic.
Today, the Queen will praise medical staff and those who provide humanitarian relief in war zones.
I have been deeply touched this year by the selflessness of aid workers and medical volunteers who have gone abroad to help victims of conflict or of diseases like Ebola, often at great personal risk.
She will also pay tribute to the 888,246 who fell in the First World War, who each had a poppy dedicated to them on display at the Tower of London earlier this year.
The message will be transmitted on both television and radio at 3pm.
The royals, who will spend the festive period at Sandringham in Norfolk, will attend a church service to mark Christmas Day.
However, they will already have opened their presents as unlike most people in the UK, they follow the German tradition of swapping gifts on Christmas Eve.
Prince Harry swapped his royal suit for football boots in a traditional Christmas kick-around at the Queen's Sandringham estate.Read the full story ›
Prince Harry has shown off the results of his photography skills in a series of images he took on a charity trip to Lesotho last week.Read the full story ›
The white Cath Kidston tank top the toddler wore in his Christmas pictures has sold out along with his festive jumper.Read the full story ›
The release of intimate snaps of Prince George are the royal family's way of saying "thank you" to the press for respecting his parent's wish for privacy.
Royal commentator Robert Jobson said: "I think what's important about these photographs is that the royal family have released them in acknowledgement that the paparazzi have allowed Prince George to grow up without intrusion. And I think that's very much a thank you in a way."
ITV News Correspondent Harry Smith has this report:
Three official Christmas pictures of Prince George show the 16-month year old is growing into a bouncing toddler.Read the full story ›
The Duke of Cambridge has described the First World War Christmas Day Truce as a "message of hope and humanity" as a memorial was unveiled.Read the full story ›
A species of magic mushroom has been discovered growing in the grounds of Buckingham Palace.Read the full story ›
The Duke of Cambridge paid tribute to his former univeristy in New York, saying that, "St Andrew's blend of academic excellence, mixed with a liberal approach to critical thought and creative reasoning, is one that both our nations, on both sides of the Atlantic, credit with importance."
Prince William was giving a speech at a benefit for the Scottish university at the Metropolitan Museum of Art in New York, which attended with the Duchess of Cambridge, the pair met while studying at St Andrew's.