Prince Philip feeling better, says Earl of Wessex
The Duke of Edinburgh is "feeling better" after being treated for a bladder infection, his youngest son Prince Edward has said.
The Earl of Wessex was speaking after visiting his father, who was admitted to hospital on Monday.
And the Countess of Wessex said he was "in good spirits, he's on good form".
The duke missed the end of the Queen's Diamond Jubilee celebrations after being taken to London's King Edward VII Hospital as a "precautionary measure".
He missed the Diamond Jubilee concert at Buckingham Palace and the national service of thanksgiving at St Paul's Cathedral on Tuesday.
In his sermon, the Archbishop of Canterbury said "our prayers and thoughts" were with him.
The Queen was accompanied in her car to the cathedral by a lady-in-waiting, Lady Farnham.
The Prince of Wales sat next to the monarch during the ceremony.
The duke had appeared to be in good health when he accompanied the Queen on Sunday on the royal barge the Spirit of Chartwell, which formed part of the rain-drenched Jubilee river pageant.
He and the Queen stood for most of the 80-minute journey, as they were accompanied by 1,000 boats travelling seven miles down the river to Tower Bridge.
The prince, who had treatment for a blocked coronary artery in December, turns 91 on Sunday.
- Elderly more vulnerable to infections
- Can be more difficult to spot in the elderly
- Most improve within a few days of antibiotic treatment
Prince Charles mentioned his father during his tribute to his mother at the end of the concert at the palace.
"The only sad thing about this evening is that my father couldn't be with us because, unfortunately, he was taken ill but if we shout loud enough he might hear us in hospital," he concluded.
Turning to his mother, he said: "As a nation, this is our opportunity to thank you and my father for always being there for us, inspiring us with your selfless duty and service and for making us proud to be British."
The St Paul's service was followed by receptions at Mansion House and the Guildhall, a lunch at Westminster Hall and a carriage procession to Buckingham Palace, then by a balcony appearance by the Queen, the Royal Family and a fly-past.
See all the latest Diamond Jubilee news and features at bbc.co.uk/diamondjubilee