Estranged princes William and Harry are on a collision course over plans to mark the 30th anniversary of Princess Diana 's death, RadarOnline.com can reveal.

Sources tell us things are so bitter between the warring pair both are considering rival television projects to honor their late mother.

Diana, Princess of Wales, was killed at 36 in a car crash in the Pont de l'Alma tunnel in Paris on 31 August 1997, alongside her companion Dodi Fayed, 42, and chauffeur Henri Paul, 41. Article continues below advertisement

What Is Harry Planning?

The devastating loss left William and Harry – aged just 15 and 12 at the time – at the center of an unprecedented wave of grief that saw more than a million people line the streets for her funeral.

Conspiracy theories about the circumstances of

See Full Page