Queen Elizabeth II has "regretfully" decided to not attend the upcoming COP26 climate change summit following a recent stay in hospital.The 95-year-old monarch has announced that she will no longer travel to Glasgow, Scotland to attend the evening reception of the United Nations Climate Change Conference, also known as COP26, on Monday as she has been advised to rest following a brief stay in hospital last week. "Following advice to rest, the Queen has been undertaking light duties at Windsor Castle," read a statement from Buckingham Palace officials. "Her Majesty has regretfully decided that she will no longer travel to Glasgow to attend the Evening Reception of COP26 on Monday, 1 November. "Her Majesty is disappointed not to attend the reception but will deliver an address to the assembled delegates via a recorded video message." In addition to the reception, the royal was due to attend a string of COP26 engagements alongside Prince Charles, the Duchess of Cornwall and the Duke and Duchess of Cambridge between 1 and 5 November. The other royals will still attend these events. The announcement comes shortly after the monarch cancelled a visit to Northern Ireland due to ill health last week. She underwent preliminary medical checks in hospital last Wednesday and returned home to Windsor Castle the following day. The monarch resumed her public engagements on Tuesday by meeting ambassadors via a video link from her Windsor residence. World leaders including U.S. President Joe Biden, British Prime Minister Boris Johnson, French President Emmanuel Macron and Canadian Prime Minister Justin Trudeau are due to attend the summit, which runs from 31 October to 12 November.