The Queen will reportedly worship at home today and is expected to be given a private Holy Communion after doctors told her to rest.
Several of the monarch's royal engagements have been cancelled, including the COP26 climate change conference which starts in Glasgow today after doctors advised her to stick to “light, desk-based duties”.
On Saturday, Prime Minister Boris Johnson insisted the Queen is on “very good form” and it's understood he spoke to the monarch as part of his normal weekly audience.
The Queen, 95, underwent tests in hospital last week and cancelled a two-day trip to Northern Ireland.
Her Majesty usually goes to church every Sunday but is not expected to attend today.
Instead, she will worship privately at Windsor Castle with the Dean of Windsor going to her for Holy Communion, reports The Sun.
The Queen also missed out on her usual visit to church last Sunday.
It comes after Buckingham Palace announced the Queen will "rest for at least the next two weeks."
The statement added: "The doctors have advised that Her Majesty can continue to undertake light, desk-based duties during this time, including some virtual audiences, but not to undertake any official visits.
"Her Majesty regrets that this means she will be unable to attend the Festival of Remembrance on Saturday, November 13.
"However, it remains The Queen's firm intention to be present for the National Service of Remembrance on Remembrance Sunday, on November 14."
The 95-year-old monarch is said to be in good spirits, and during Friday afternoon recorded her Cop26 speech for the UN climate change conference which opens on Monday in Glasgow.
Earlier this week, the head of state announced she would not be attending the evening reception for world leaders on the global event's opening day, and instead recorded the video message which will be played to delegates.
The Queen appeared cheerful and in good humour when she hosted a virtual presentation ceremony on Thursday, awarding the Queen's Gold Medal for Poetry 2020 to poet David Constantine.
Speaking from Windsor Castle during a video call, she joked with the writer at Buckingham Palace, saying about his award "Do you put it in a cupboard?
It was announced last Wednesday the Queen had "reluctantly" accepted medical advice to rest and cancelled her trip to Northern Ireland that was scheduled to begin that day.
But it later emerged she had stayed overnight in King Edwards VII's Hospital in central London.
Buckingham Palace confirmed the head of state had undergone "preliminary investigations" during her first overnight stay at a medical facility in eight years.
