Yes the late Queen died on 8 September 2022 and on 11 September 2022, the hearse passed through the gates of Balmoral Castle to start the journey of 175 miles to Edinburgh. The Princess Royal and her husband followed in the car behind. On arrival at the Palace of Holyroodhouse in Edinburgh the coffin lay overnight so that palace staff and members of the Royal Household could pay their respects. Then on 12 September 2022 a procession accompied the coffin from the Palace of Holyroodhouse to St Giles’ Cathedral. After a short service the Queen lay in state to allow the people of Scotland to pay their respects. In the late afternoon of 13 September 2022 the late queen travelled from Scotland by an Royal Air Force aircraft from Edinburgh Airport and was accompanied on the journey to RAF Northolt in London by the Princess Royal. That is where the 12/13 September reference comes from. From 12 to 13 September 2022 the late Queen lay in state on that spot in St Giles Cathedral in Edinburgh similarly as she did in Westminster Hall in London before her funeral on 19 September 2022.