Plans are said to be being made for members of the royal family to stand in for the Queen during parts of Trooping the Colour for the first time in 70 years.
It is thought that Prince Charles, Prince William and Princess Anne may take the royal salute instead as the monarch continues battling mobility problems.
It is still hoped that Queen, 96, will still be able to attend part of the iconic ceremony at the Horse Guards Parade on June 2.