Prince William on Thursday accused the British Broadcasting Corporation (BBC) of contributing significantly "to the fear, paranoia and isolation" felt by his late mother, Princess Diana, in the years prior to her death.

Prince William spoke after a 127-page inquiry report concluded that BBC journalist Martin Bashir used "deceitful behaviour" to secure his controversial interview with Diana in 1995.

"But what saddens me most, is that if the BBC had properly investigated the complaints and concerns first raised in 1995, my mother would have known that she had been deceived. She was failed not just by a rogue reporter, but by leaders at the BBC who looked the other way rather than asking the tough questions," he said.

His remarks came after the BBC offered an apology over the controversial 1995 interview, in which Diana detailed the breakdown of her relationship with Prince Charles, CNN reported.

Prince William also accused the BBC of commercialising a "false narrative" about his mother. "It is my firm view that this Panorama programme holds no legitimacy and should never be aired again. It effectively established a false narrative which, for over a quarter of a century, has been commercialized by the BBC and others."