The Queen is to hold the traditional welcome to Balmoral Castle privately this year to ensure her “comfort”.
A military unit is normally inspected by the monarch at the gates of her Scottish retreat to mark the Queen taking up residence at her home.
But the event will be held behind the gates inside the grounds of Balmoral, with a source saying: “This is a change in line with events being adapted for Her Majesty’s comfort”.
The Queen has faced mobility issues since last autumn and now regularly uses a walking stick, with some of her official engagements this year shorter in length than on previous occasions.
She missed much of her Platinum Jubilee celebrations during the extended Bank Holiday weekend in June but did make two separate brief appearances on the Buckingham Palace balcony.
The Queen, who travelled to Scotland on 21 July, is believed to have been staying at a property on her estate and will move to her main Balmoral home today.
The monarch is unlikely to be alone for very long as members of her family are invited to spend time with her at Balmoral every summer.
She is also expected to break her summer holiday and travel back to England to hold audiences with the outgoing Prime Minister Boris Johnson and his successor in early September.