Following Her Majesty’s overnight stay in hospital on Wednesday night, there is uncertainty over whether she will attend the upcoming UN Climate Change Conference in Glasgow on November 1.
The Queen has been told to rest by doctors and wait for the results of “preliminary investigations.”
A Palace source told the Mirror the results of the initial tests “could result in the need for further examinations….or confirm that no further tests are necessary”.
The source added: “Clearly the doctors are looking at something during their preliminary investigations.”
Earlier in the week, a US royal commentator claimed the queen’s attendance at this year’s COP26 climate summit in Glasgow was called into question amid health concerns.
The COP26 conference in Glasgow is taking place to urge world leaders to do more to tackle climate change and the Queen is committed to attending the event with Prince Charles and Prince William.
Richard Berthelsen told CTV News: “The Queen was looking forward to hosting world leaders in Glasgow next week, in conjunction with the environment summit, obviously it’s very important to both Prince Charles and Prince William who are also participating.
“It’s a full court of press, it’s important to the UK government, it’s important to many people around the globe.
“I think the Queen wants to be there, there’s no question if there are any concerns over her health, that will not happen.”
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Buckingham Palace said she was in “good spirits” following preliminary investigations during her visit to hospital.
The statement read: “Following medical advice to rest for a few days, the Queen attended hospital on Wednesday afternoon for some preliminary investigations, returning to Windsor Castle at lunchtime today, and remains in good spirits.”