The Queen yesterday sparked health concerns by canceling her first royal duties in 15 years.
His Major, 95 – due to travel to Northern Ireland – has been asked by doctors to rest for a week instead.
She will also cut back on her winter commitments.
She was due to be granted royal status at Hillsborough Castle near Belfast as part of a two-day work trip.
This is the first time the Queen has pulled out of a royal engagement in 15 years.
Sources say that she did not go to the hospital or was canceled due to any illness or disease.
But with her knee aching, doctors told her to stay at home on Tuesday after standing for more than an hour at an event at Windsor Castle.
She, Charles and William have become more engaged since Harry, Meghan and Andrew stepped down from royal duty.
understands that the Queen is committed to working as hard as possible and was determined to walk her dogs at the Castle yesterday afternoon.
Royal specialist Penny Junor said: “It’s not surprising that she has been asked to keep her feet up. She’s working extremely hard. She was in great form at Castle but we need to protect her. The doctors. Has said enough is enough and it is right to exercise caution.”
Granthshala Royal photographer Arthur Edwards, 81, said: “I know she won’t give up. My advice is, madam, pace yourself. I have to!”
A statement confirming her absence was issued yesterday at 11 a.m., just before she was due to take place at Hillsborough Castle at 4 p.m. Many of its employees had already traveled to Northern Ireland.
A Palace spokesman said yesterday: “The Queen has reluctantly accepted medical advice to rest for the next few days.
“She is in good spirits and is disappointed that she will no longer be able to leave.
“The Queen sends her warmest wishes to the people of Northern Ireland and looks forward to visiting in the future.”
Her Majesty – who had recently decided to wean off after doctors’ advice – had a knee operation in 2003.
He has been suffering from pain recently and has been seen with a stick.
Rani recently stepped down but she is 95 and doctors are right to tell her to slow down.
She was on her feet to greet guests including Boris Johnson, Bill Gates and the new Saudi chairman of Newcastle United, Yasser bin Othman Al-Rumayan, at the Global Investment Summit in Windsor on Tuesday night.
Since the summer at Balmoral, the Queen has had 14 engagements in the past three weeks – often with her wand. He used it last week at Westminster Abbey and Cardiff but discarded it at Tuesday’s Castle Summit.
The last time she withdrew from a royal engagement on short notice was from a visit to Arsenal FC in 2006, when she was replaced by Prince Philip.
A bad cold in Christmas 2016 forced her to cancel a church service in Sandringham, Norfolk. Today she was due to attend a ceremony in Armagh to commemorate 100 years of Northern Ireland.
This will be the first visit to the country in five years.
Nothing is now official in his diary until the COP26 climate change summit in Glasgow on 1 November.
Insiders say that she may have a video call with the ambassadors.
Ingrid Seward of Majesty Magazine said: “The Queen has recently stepped up, but she is 95 and doctors have told her to slow down.”
‘Even traveling long distances by plane puts you at risk of clots in the lungs and legs’
By Dr Ragib Ali, Oxford University Hospitals Trust
The queen is extraordinary. No man of his age has such a job.
If an elderly person spends a lot of time walking or standing then it puts extra strain on the body.
This can weaken muscles and cause falls and breaking bones.
Traveling long distances by plane can also put you at risk of clots in the lungs and legs.
As circulation weakens with age, the feet can also swell and cause discomfort. Rani will also be vulnerable to covid, cold and flu.
I’m sure she won’t be happy about the cancellation as she enjoys her duty very much but the obvious clinical advice is to take it easy during the winter.