Fireworks promised for Hard Rock Calling
Pyrotechnics are not usually allowed during concerts in Hyde Park, since the location is underneath a flight path.
However, an unnamed source has told the Daily Star that the rules are being relaxed by the Queen following a special request from headline act Sir Paul McCartney.
The former Beatle regularly uses pyrotechnics to dramatic effect when he performs Live and Let Die, his classic theme song for the 1973 James Bond film.
Commenting on the move, the insider said: "The Queen herself is the only person who can change that rule, so she's clearly a Macca fan."
This appreciation could be mutual, as Sir Paul famously wrote a song called Her Majesty, which featured on The Beatles' 1969 album Abbey Road.
His acoustic ditty was later performed in front of the Queen when he played at Buckingham Palace to mark her Golden Jubilee.
By Jemma Howard