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The King's Troop Royal Horse Artillery fired a 41-gun salute to celebrate the Duke of Edinburgh's 91st birthday.
The salute took place at midday today, led by Parade Commander Adjutant Captain John Gibson RHA.
A Royal Salute normally consists of 21 guns, but this is increased to 41 rounds if fired from a Royal Residence or Royal park.
His Royal Highness The Duke of Edinburgh received two gun salutes today to celebrate his 91st birthday yesterday.
The Kings Troop Royal Horse Artillery fired a 41-gun salute in Hyde Park and the Honourable Artillery Company fired a 62-gun salute at the Tower of London.
Two gun salutes will be fired tomorrow to mark the Duke of Edinburgh's birthday.
The King's Troop's 41-gun salute in Hyde Park will be accompanied by a 62-gun tribute by the Honourable Artillery Company at the Tower of London, both at midday.
The Duke's sense of humour has evidently not been damaged by his recent illness.
Asked outside the hospital if he was feeling better, Philip replied: "Well, I wouldn't be coming out if I wasn't."
A spokesman for Buckingham Palace said: "The Duke of Edinburgh continues to make a good recovery and he will continue his convalescence at home.
"He will spend the weekend privately."
The Duke of Edinburgh has left King Edward VII Hospital in London in time for his 91st birthday.
The Duke of Edinburgh will find out today whether he will be forced to spend his 91st birthday in hospital.
The Duke was admitted to the King Edward VII Hospital in central London on Monday suffering from a bladder infection.
Yesterday, he enjoyed the company of grandsons the Duke of Cambridge and Prince Harry who paid a short, private visit.The Princes, dressed in jeans and V-neck jumpers, left the hospital after 20 minutes without commenting.
Philip has already been visited by the Queen, the Duke of York, the Earl and Countess of Wessex and their children.
Andrew said on Wednesday his father was "mending very well" but Buckingham Palace said they had no further update on his condition and did not know when he would be discharged.
Philip had been planning to celebrate his birthday on Sunday privately and is not due to attend his next scheduled engagement until Tuesday, when the Queen hosts a garden party at the Sandringham Estate to mark her Diamond Jubilee.
It is hoped her husband will be by her side at her Norfolk retreat if he has been discharged in time.It is also hoped he will be able to accompany her to the East Midlands on Wednesday for a two-day visit as part of the Queen's Jubilee tour of the UK.
Philip's admission to hospital meant he was forced to miss some of the Jubilee celebrations this week.He spent Sunday braving the elements for the Thames River Pageant, which doctors suggested might have exacerbated his condition if he did not make enough visits to the toilet.
The Palace said earlier this week that he was being treated with antibiotics and was in good spirits.
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Having been released from hospital on Saturday afternoon the Duke of Edinburgh will be spending his 91st with his family.
The Duke of Edinburgh left King Edward VII Hospital in London today in time for his 91st birthday.