The Duke passed away at Windsor Castle aged 99 on Friday.
Buckingham Palace announced Prince Philip's death just after midday, issuing a statement that spoke about the royal family joining with people across the globe “mourning his loss”.
Gun salutes marking his death, will take place in London, Cardiff, Belfast and Edinburgh as well as aboard some Royal Navy ships and in Gibraltar today.
Some 41 rounds will be fired at the locations around the UK at a rate of one shot per minute from midday.
An international figure since marrying the Queen more 70 years ago, the Duke of Edinburgh’s death was marked with tributes from world leaders, foreign royal families and charities he supported.
The Palace said in a statement: “It is with deep sorrow that Her Majesty the Queen announces the death of her beloved husband, His Royal Highness the Prince Philip, Duke of Edinburgh.
“His Royal Highness passed away peacefully this morning at Windsor Castle.
“Further announcements will made in due course.
“The Royal Family join with people around the world in mourning his loss.”
No further details were released about the circumstances of his death.
The announcement of Philip’s death was shared on the royal family Twitter account, whilst a framed notice was attached to the railings of Buckingham Palace for a short period.
Prime Minister Boris Johnson was one of the first national figures to pay tribute to the Duke – the longest-serving consort in British history.
Speaking from Downing Street, Mr Johnson said: “He was an environmentalist, and a champion of the natural world long before it was fashionable.
“With his Duke of Edinburgh awards scheme he shaped and inspired the lives of countless young people and at literally tens of thousands of events he fostered their hopes and encouraged their ambitions.
“We remember the duke for all of this and above all for his steadfast support for Her Majesty the Queen.”
Oxfordshire has been reacting to the news in the last 24 hours - including our MP's:
My sincerest condolences to HM the Queen and to the Royal Family on the sad loss of HRH the Duke of Edinburgh. He served our country with distinction and with great steadfastness.— John Howell (@JHowellUK) April 9, 2021
So very sad to hear of the news of Prince Philip, Duke of Edinburgh’s passing. My thoughts are with his family and especially the Queen. May he rest in peace.— Layla Moran 🔶 (@LaylaMoran) April 9, 2021
A terribly sad day for us all. A great man who lived a life of service for our country in times of peace and in war. https://t.co/4pp6OQzmb9— Robert Courts MP (@robertcourts) April 9, 2021
The Duke of Edinburgh visited Oxford University on numerous occasions over the last few decades.
He was a Senior Honorary Fellow of University College; the Visitor of St Catherine’s College and was an honorary member of St Edmund Hall Cricket Club.
The Chancellor, the Rt Hon the Lord Patten of Barnes, paid tribute: 'His Royal Highness The Prince Philip, Duke of Edinburgh, was a magnificent consort for Her Majesty Queen Elizabeth and a great public servant in many different sectors of our national life.
’He was Chancellor of Cambridge University for over 30 years and I had the privilege of occasionally working with him during that period while he was doing an important job with high intelligence and an enormous commitment to higher education and research.
’The whole country has good reason to be grateful for his years of service.'
Prince Philip visited Oxford Brookes University back in 1963 to officially open the newly completed Headington site, the Clerici building.
Vice-Chancellor of Oxford Brookes University, Professor Alistair Fitt, pays tribute to the Duke, saying: “We join the nation in mourning the passing of His Royal Highness The Prince Philip, Duke of Edinburgh.
”The University and its predecessor institutions are honoured to have received visits from the Duke across the decades, during which he showed a deep interest in higher education and our students’ progress in realising their ambitions and making a difference in the world.
“He was a dedicated and committed public servant and our thoughts are with Her Majesty The Queen and the Royal Family at this sad time.”
The Chief Constable of Thames Valley Police, John Campbell, QPM, has offered his "deepest condolences" to The Queen.
He said: “The Duke of Edinburgh is the longest serving British consort and Thames Valley Police has had the privilege to protect and serve both the Duke of Edinburgh and Her Majesty The Queen while in residence at Windsor Castle.
“We have a long and proud association with the Royal family and have had the privilege to police a number of Royal events, from the annual Windsor Garter Ceremony, to State Visits, to Her Majesty’s 90th birthday and more recently the Royal Weddings.
“On behalf of the whole of Thames Valley Police, I offer our deepest condolences to The Queen, to all of the Royal Family and members of the Royal Household.”
We are deeply saddened by the death of His Royal Highness Prince Philip, the Duke of Edinburgh.— Thames Valley Police (@ThamesVP) April 9, 2021
All of us at @ThamesVP offer our sincere condolences to Her Majesty The Queen and the Royal Family at this very sad time. pic.twitter.com/T7SZTxtqMU
Horses from Thames Valley Police mounted section will be carrying out high visibility patrols in Windsor as the nation mourns Prince Philip’s death.
Bells at Christ Church in Oxford rang out on Friday to mark his passing.
The Sub Dean, Canon Richard Peers, said: "Our thoughts and prayers are with the family who are mourning the loss of a husband, father, grandfather and great-grandfather as well as a much-loved public figure.
"We will be remembering them all in our prayers in the Cathedral at Evensong...in the days to come."
The Cathedral will abe open to the public from 10am till 4pm today (10/04) for private prayer and reflection.
Oxford United, Oxfordshire's Council's, the Diocese of Oxford and many more have also paid their respects online.
Everyone at Oxford United is saddened to learn of the passing of His Royal Highness The Prince Philip, Duke of Edinburgh.— Oxford United FC (@OUFCOfficial) April 9, 2021
The thoughts of everyone are with Her Majesty the Queen and the Royal Family. https://t.co/qu5X4MGBg6
An online book of condolence has been openedfor people to leave a message for the Royal Family.
The Royal Family has opened a national Book of Condolence which is available to sign here: https://t.co/fHkZOGpLlz— Oxford City Council (@OxfordCity) April 11, 2021
The Royal Family ask that members of the public consider making a donation to a charity instead of leaving floral tributes in memory of The Duke. pic.twitter.com/rKQVoVgVId