The reclusive widow of Lord Lucan is set to break her silence in front of TV cameras for the first time since her husband's disappearance 43 years ago.
The Countess of Lucan is set to speak about how her husband tried to bludgeon her to death and murdered the family's nanny, in a documentary exploring the mysterious peer.
It's the first time the 79-year-old has ever agreed to take part in such a film and she is understood to be receiving a £56,000, according to the Sunday Express.
Lady Lucan has been seen in front of cameras at various London locations, including the church in Knightsbridge, where she first married the 7th Earl.
The widow has also allowed the cameras into her rented flat, near the house where she nearly died on 7 November 1974, after being repeatedly hit over the head with lead piping.
Lady Lucan had appeared at her local pub, covered in blood, crying for help and saying the family's nanny, Sandra Rivett, was dead. She told police her estranged husband had attacked her and 29-year-old Ms Rivett.
The Lucans had been locked in a custody dispute over their three children. Police concluded Lord "Lucky" Lucan, a professional gambler, had murdered Ms Rivett in the basement of the family's townhouse, after mistaking her for his wife.
The Lord had left a trail of debt and the mystery of his whereabouts led to decades of speculation. Police believed Lucan, a German speaker, had fled to Nambia, a former German colony.
But Lady Lucan, known as Veronica, believes he threw himself off a boat in the English Channel the morning after the murder.
The couple's children, George, Camilla and Frances, who were sleeping upstairs at the time of the murder, continued to live with their mother after the attack.
But when Veronica suffered a breakdown, custody of the children was passed to her sister Christina Shand Kydd. Lady Lucan has not spoken to any of her children since.
A death certificate was not issued for Lord Lucan until last year. It was only then that his son, George Bingham, 49, could inherit the family title.
A friend of Lady Lucan told the Sunday Express her decision to work with the filmmakers was partly motivated by money, but principally for "revenge against her son".
The friend told the paper: "She knows George will be angry when he sees the film."
In a 2013 ITV drama, Rory Kinnear portrayed the earl as a reckless gambler who was prepared to stop at nothing to get custody of his children.
Lady Lucan has said privately she has no wish for a reconciliation with her children and has not met her grandchildren. George is married to Anne-Sofie, the daughter of a Danish industrialist.
The couple had a daughter last year. The present Earl is unlikely to be happy about his mother's participation in the documentary.
He is said to have burned all his father's papers and photographs in a bid to get on with his life.