Queen Elizabeth will break with tradition to appoint Britain's new prime minister at her Balmoral Castle residence in Scotland rather than at Buckingham Palace in London.
This due to the 96-year-old monarch's mobility issues.
A Buckingham Palace spokesperson said on Wednesday that the queen would meet outgoing Prime Minister Boris Johnson as well as his successor on September 6 at Balmoral, where the monarch spends her summers.
She will have an audience with Britain's new leader — either Foreign Secretary Liz Truss or former finance minister Rishi Sunak — shortly after meeting with Johnson.
The result of the Conservative Party leadership contest to succeed Johnson will be announced on September 5, with polls making Truss the clear frontrunner.
The decision to have the audiences at Balmoral was taken to provide certainty for the new prime minister's diary and avoid having to make any last-minute changes were the queen to experience mobility issues.
Johnson, on July 7, announced his decision to step down, following numerous scandals involving his administration and the resignation of several Cabinet members.