The Queen is the first British monarch to celebrate a Platinum Jubilee, 70 years of reign to the throne, and is spending the day privately.
In a message marking the 70th anniversary of her reign, the Queen said it was her “sincere wish” that Camilla would have that title.
Prince Charles welcomed his mother’s wish that Camilla, Duchess of Cornwall, be known as Queen Consort when he becomes King. He said he and his wife were “deeply conscious of the honour”.
Prince Charles said in a statement: “The Queen’s devotion to the welfare of all her people inspires still greater admiration with each passing year.
“We are deeply conscious of the honour represented by my mother’s wish. As we have sought together to serve and support Her Majesty and the people of our communities, my darling wife has been my own steadfast support throughout.”
The 95-year-old said in a written message to the nation: “I would like to express my thanks to you all for your support. I remain eternally grateful for, and humbled by, the loyalty and affection that you continue to give me.”
She reflected on how much she had gained from support given “unselfishly” by Prince Philip and thanked the goodwill shown to her by “all nationalities, faiths and ages in this country”.
The Queen signed off the message: “Your servant Elizabeth R.”
Many have congratulated the Queen on this historic day, including Boris Johnson, Theresa May and David Cameron – three of the 14 British prime ministers to occupy No 10 during her reign.