Prince William and Prince Harry were at the City Salute extravaganza in front of St. Paul’s Cathedral last night.

Princes William and Harry with injured servicemen and relatives

Sharing the limelight with the Lord Mayor of London, who presided, the mounted Household Cavalry — their own regiment — various squadrons from the RAF and Royal Navy, Jeremy Clarkson and Joss Stone, the two Princes mingled with the crowd of injured servicemen and their relatives.

Various displays were put on, including a Son et Lumiere light show on the facade of the Cathedral. A banquet was later held in the ancient Guildhall in Cheapside.

It was hoped to raise £500,000 ($1m) for Headley Court Military rehabilitation centre in Surrey.

The first hour was broadcast live by BBC2.

A concert in memory of Princess Diana, who died ten years ago this summer, is being held at the new Wembley stadium on Sunday, July 1, which would have been her 46th birthday.

The concert is being organized by her two sons, Prince William and Prince Harry, with the help of Chelsy Davy and Kate Middleton, both of whom are expected to be there.

Already lined up to perform are Elton John, Rod Stewart, Duran Duran, Take That, Lily Allen, Bryan Ferry, Pharrell Williams, The English National Ballet, Joss Stone, The Feeling, Fergie, James Morrison, Natasha Bedingfield, P. Diddy, Will Young and Andrew Lloyd Webber, who will stage a medley of songs from some of his greatest West End shows.

The event will be shown worldwide on TV and by internet streaming. You can find out how to view it in your country here.

I’ve no idea whether this is true or not, but PR-inside.com is reporting that William is getting close to Devon-born blues singer, Joss Stone.

The report says : “JOSS STONE has prompted reports of a romance with British heir PRINCE WILLIAM after claims the Royal regularly calls the singer to discuss her performance at the forthcoming Diana, Princess of Wales concert. Stone is among a number of acts due to perform at the London gig on 1 July (07) , to mark what would have been the Princess’s 46th birthday — including Sir Elton John and Duran Duran — but friends claim single Stone, 20, has been getting special treatment from the 24-year-old Prince, who recently split from longterm love Kate Middleton.”

The report then quotes a British tabloid newspaper : “A friend tells British newspaper the Daily Mirror, ‘She thinks he’s gorgeous and is incredibly flattered.’ ”

A source is then quoted : “Joss is delighted by the fact that William is phoning her and they hit it off instantly. They’ve spent ages talking about which songs she should perform.”

Apparently, Joss Stone recently complained about her love life. She has been single since splitting with Beau Dozier two years ago. She is said to have moaned, “I think I’ll have to turn lesbian. Every girl my age wants to be in a relationship.”

Feasible? Who knows. At least her new Devon home is fairly near to Bovington Army base in Dorset, where William is now stationed.