The Queen, 95, was due to travel to Scotland for Cop26 but has since pulled out of hosting a major reception for world leaders. The monarch is following the advice to rest and carry out only light duties, and remains in good spirits. Royal expert Angela Levin has said this is a "watershed moment" for the royals.

       Asked if this is a "watershed moment" for the Royal Family, Ms Levin told Sky News: "I think it is.

       "I think it was her having a walking stick. It seems like quite a small thing, you can say 'so what?' because it was cobblestones to get to Westminster Abbey.

       "I think these are very significant and things can change enormously.

       "I think people are not going to put pressure on her to do as many engagements as she would like. I think they would ease right off and so they should.

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       "She's also not going to go anywhere without one of the other senior royals being with her so if she doesn't feel very well, someone can do it.

       "She doesn't have to let people down.

       "I think this will make her feel more relaxed and work very well.

       "Although she's a superwoman, she's not going to be a superwoman forever."

       The Queen faced preliminary tests in hospital on October 20 during her first overnight stay at a medical facility in eight years.

       She has been resting following medical advice to cancel her two-day trip to Northern Ireland last week.

       But she returned to work on Tuesday, carrying out virtual audiences from Windsor Castle, her first official engagements in seven days, after she was ordered to rest by doctors.

       The Queen is also expected to carry out light engagements in the coming days.

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       Concern for her will be high, given her age, and she is being looked after by her medical household, her expert team of royal physicians.

       Since returning from Balmoral the Queen's schedule has been busy throughout October and her first hospital stay was kept a secret and only confirmed by the palace when it was revealed by The Sun.

       The Queen used a walking stick for the first time at a major engagement during a service at Westminster Abbey on October 12 and on Sunday she missed a church service at Windsor.

       Buckingham Palace would not comment on whether the monarch has received her booster Covid-19 jab, but given her age it is likely she has already had it.