MIRROR Online: LONDON, England, By Jennifer Newton, Royal Features Writer –

The Queen has been put under medical supervision after doctors voiced concerned for Her Majesty’s health, it has been confirmed.

Prince Charles, Camilla and Prince William have rushed to Balmoral to be by her side while other members of the royal family have been informed. Buckingham Palace issued a rare statement on the Queen’s health today to say that she remains comfortable and is staying at Balmoral.

The news follows months of growing concern for the 96-year-old’s health which has seen her pull out of several official and private engagements. The statement 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.”

Prince Charles’ helicopter was seen landing at Balmoral this morning and it’s understood that William is flying from Windsor to be with his grandmother.

Camilla has cancelled an engagement in Lanarkshire to travel to the estate while Princess Anne has arrived from elsewhere in Scotland.

It is not known if the Duchess of Cambridge has joined her husband for the trip, as today marks Prince George, Princess Charlotte and Prince Louis’s first day at their new school following the family to Windsor.

Prince Harry and Meghan Markle were due back in the UK today ahead of an engagement this evening.

The Queen greets new PM Liz Truss on Tuesday

The Queen greets new PM Liz Truss on Tuesday – Image: PA

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It comes just days after the Queen met with Liz Truss to officially appoint her as the new Prime Minister.

Ms Truss sent a message on Twitter and 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.”

The nation’s longest-reigning monarch has ongoing mobility issues and looked bright but frail and used a walking stick during Tuesday’s historic audience with Ms Truss, which followed a visit from outgoing prime minister Boris Johnson as he tendered his resignation.

There was speculation on social media after politicians were seen passing notes in the House of Commons earlier today.

Speaker Lindsay Hoyle said to MPs: “We send our best wish to HM the Queen and that she and the Royal Family are in our thoughts and prayers at this moment.”

Meanwhile, 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.”

Conservative prime minister David Cameron said he was “deeply concerned” by the news about the Queen’s health.

“Deeply concerned by the news this afternoon from Buckingham Palace,” he tweeted.

“I send my heartfelt thoughts and prayers to Her Majesty The Queen and the Royal Family at this worrying time.”

The Archbishop of Canterbury has also said the “prayers of the nation” are with the Queen.

“My prayers, and the prayers of people across the (Church of England) and the nation, are with Her Majesty The Queen today,” Justin Welby tweeted.

“May God’s presence strengthen and comfort Her Majesty, her family, and those who are caring for her at Balmoral.”

The Queen at he Palace of Holyroodhouse in Edinburgh a few months ago

The Queen at he Palace of Holyroodhouse in Edinburgh a few months ago – Image: PA

The monarch, 96, has ongoing mobility issues and had been due to hold a Privy Council meeting virtually yesterday but it was postponed.

During the proceedings, Ms Truss would have taken her oath as First Lord of the Treasury and new cabinet ministers would have been sworn into their roles, and also made privy counsellors if not already appointed as one in past.

A Palace spokesman said yesterday: “After a full day yesterday, Her Majesty has this afternoon accepted doctors’ advice to rest.

“This means that the Privy Council meeting that had been due to take place this evening will be rearranged.”

Top Feature Photo: The Queen pictured on Tuesday before meeting new Prime Minister Liz Truss – Getty Images