Earl Spencer has said he still suffers nightmares about the funeral of his sister Diana, the Princess of Wales.
The death of the Princess in Paris caused a national outpouring of grief in 1997.
The funeral service – which was streamed live around the world on television – drew global attention.
Earl Spencer walked alongside his nephews William and Harry, then 15 and 12, behind the cortege as it made its way to Westminster Abbey, and attacked the media for its relentless hounding of his sister in his eulogy.
Speaking to the BBC, the Earl revealed the true extent of his trauma, saying it felt like a “sort of absolute crashing tidal wave of grief.”
Spencer said the ordeal was "truly horrifying" adding that it would have been even worse for the two princes.
He also said the eulogy was a chance for Diana speak, and the “elements of the paparazzi and tabloids” brought her low in her final years.
The 20-year anniversary of the death of Diana, Princess of Wales, falls on August 31.