WHOEVER wins the Conservative Party leadership contest will need to travel from London to Aberdeenshire before they can become Prime Minister, Buckingham Palace has said. 

For the first time in her 70-year reign, the Queen will fulfil her constitutional duty of asking the leader of the largest party in the Commons to form a government from Balmoral. 

Boris Johnson will also need to come to the Cairngorms before he can formally quit. 

The increasingly frail 96-year-old monarch, who has faced ongoing mobility issues, has been in Scotland for her usual summer break for the last month. 

According to the PA, the Palace was concerned her trip back to London could be derailed by an "episodic mobility issue." They wanted to give some certainty about next week's events so as not to risk any last-minute rearrangements.  

A Buckingham Palace spokesperson said: "The Queen will receive Prime Minister Boris Johnson on Tuesday September 6 at Balmoral, followed by an audience with the new PM."

Voting in the Tory leadership contest ends on Friday, with either Liz truss or Rishi Sunak announced as the winner on Monday. 

Whoever wins will be the 15th prime minister during the Queen's reign.  

Traditionally, the outgoing PM will say a few words on the doorstep of No 10 before heading to Buckingham Palace.

Once they have taken their leave of the monarch, their successor then arrives and is asked to form Her Majesty’s Government

The Queen has been forced to cancel a number of plans over the last year, including much of her Platinum Jubilee celebrations, only appearing briefly on the palace balcony.

It is unknown if she will make this weekend's Braemar Gathering. The Highland Games are said to be a highlight of the Queen's summer. 

Mr Johnson told reporters during a visit to Barrow-in-Furness that the government would "certainly make sure that the arrangements for the handover will fit totally around [the Queen] and whatever she wants."