Britain's Queen Elizabeth has cancelled her planned visit to Northern Ireland, where she was due to attend a church service tomorrow marking the centenary of Northern Ireland.
The prayer service at St Patrick's Church of Ireland Cathedral has been organised by the four main churches in Northern Ireland.
In a statement this morning, a Buckingham Palace spokesman said: "The Queen has reluctantly accepted medical advice to rest for the next few days.
"Her Majesty is in good spirits and is disappointed that she will no longer be able to visit Northern Ireland, where she had been due to undertake a series of engagements today and tomorrow.
"The Queen sends her warmest good wishes to the people of Northern Ireland, and looks forward to visiting in the future."
The Queen's decision is understood not to be related to coronavirus and she is resting at Windsor Castle.
She is still expected to attend events linked to the Cop26 climate change conference in Glasgow at the end of the month.
Last month, President Michael D Higgins declined an invitation to the centenary event.
He said he decided it would be "inappropriate to attend" and that the event title "isn't a neutral statement politically".
Taoiseach Micheál Martin said that he respected President Higgins' decision.
The Government will send two representatives to the ceremony - Minister for Foreign Affairs Simon Coveney and Chief Whip Jack Chambers.
