A flight containing members of the royal family has landed at Aberdeen Airport ahead of their anticipated arrival at Balmoral.
Royal Air Force flight KRF23R took off from RAF Northolt in South Ruislip, west London, at 2.39pm, according to flight tracking website Flightradar24.com.
The Dassault Falcon landed at the Scottish airport at 3.50pm.
The RAF plane was carrying the Duke of Cambridge, the Duke of York and the Earl and Countess of Wessex.
Aberdeen Airport
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The members of the Royal Family are visiting the Queen at Balmoral
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It comes just hours after a Buckingham Palace spokesperson said the Queen's doctors were "concerned" for Her Majesty's health.
The spokesperson said: “Following further evaluation this morning, the Queen’s doctors are concerned for Her Majesty’s health and have recommended she remain under medical supervision.
"The Queen remains comfortable and at Balmoral.”
While the Duke and Duchess of Sussex were due to attend the WellChild Awards ceremony in London on Thursday evening, but have changed their plans to travel to see the Queen.
“The Duke and Duchess of Sussex will be travelling to Scotland”, a spokesperson for the couple said.
Following the Palace's announcement, Prime Minister Liz Truss said: “The whole country will be deeply concerned by the news from Buckingham Palace this lunchtime.
“My thoughts – and the thoughts of people across our United Kingdom – are with Her Majesty The Queen and her family at this time.”
Labour leader Sir Keir Starmer said he is “deeply worried” by the news from Buckingham Palace and he is hoping for the Queen’s recovery.
He tweeted: “Along with the rest of the country, I am deeply worried by the news from Buckingham Palace this afternoon.
“My thoughts are with Her Majesty the Queen and her family at this time, and I join everyone across the United Kingdom in hoping for her recovery.”