Lord Lucan's son has insisted his father - who disappeared almost 40 years ago - committed suicide by drowning himself on the night his nanny was murdered.

According to George Bingham, Lucan wanted to "vanish forever" after nanny Sandra Rivett's murder - with his 45-year-old son telling the Daily Mirror his father drowned himself in the English Channel.

“He would have got on board with a bottle of whisky and some pills and taken it out to the 50 metre mark, the point where if you go down you’re not going to come back up again...

lord lucan

Lord Lucan's son claims he believes his father drowned himself in the English Channel

"It would have been cold, very cold and he would have died of ­hypothermia before the water got in his lungs. I am sure, without an ounce of doubt, it happened before dawn lifted on the morning after Sandra’s murder.”

Lord Lucan went missing following the gruesome death of his son's nanny, Sandra Rivett, in 1974 and was declared dead by the High Court in 1999. An inquest jury named him as the killer in 1975.

Ms Rivett, 29, was found dead at the home of the peer's estranged wife in Belgravia, London after being bludgeoned with a lead pipe.

SEE ALSO:
  • Lord Lucan's Son George Bingham 'Took Midnight Walks In Namibia'
  • Lord Lucan, Watch Owned By Missing Aristocrat 'Discovered In South Africa'
  • The nanny's attacker turned on Lady Lucan, beating her severely before she managed to escape and raise the alarm at a nearby pub.

    Lucan's car was later found abandoned and soaked in blood in Newhaven, East Sussex, and an inquest jury declared the wealthy aristocrat was the killer a year later.

    There have been numerous "sightings" of the missing nobleman, often in Australia and India.

    Most recently a BBC report interviewed a former personal assistant to Lord Lucan's friend John Aspinall, who claimed the peer was living in Africa during the 1980s.

    There are also claims Lucan, who would be 77 if he was still alive, was visited by his children at least twice in Africa.

    But his son, 45, said he did not believe the peer had killed Miss Rivett, saying: "He knew his name would be circulated and there would be a firestorm."

    "He didn’t want 38 years of looking over his shoulder, waiting for some friend to give him up.

    "Or hiding in a foxhole with a straggly beard like Saddam Hussein."

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    • 28th November 1963: John Richard Bingham, Earl of Lucan, and Veronica Duncan after their marriage. (Photo by Douglas Miller/Keystone/Getty Images)

    • 15th November 1974: Veronica Lucan, the Dowager Countess of Lucan, wife of the missing Earl, Lord Lucan who disappeared following the murder of their nanny. She is returning to her home in Lower Belgrave Street, London after a High Court appearance to discuss the future of her 3 children. (Photo by Frank Barratt/Keystone/Getty Images)

    • Sandra Rivett, who was allegedly murdered by Lord Lucan (Tophams/Topham Picturepoint/Press Association Images)

    • Lord Lucan. Infamous for the murder of Sandra Rivett in November 1974, he disappeared without trace before arrest or trial. (Tophams/Topham Picturepoint/Press Association Images)

    • Lord and Lady Lucan - 1964 Lucan is infamous for the murder of Sandra Rivett in November 1974, he disappeared without trace before arrest or trial. (Topham/Topham Picturepoint/Press Association Images)

    • Lord George Bingham, heir to Lord Lucan dated 14.02.95 : Lord Lucan's son was today (Sunday) warned he faced a protracted struggle lasting several years in his apparent attempt to assume the title of his missing father. To become the Eighth Earl of Lucan, Lord Bingham would seek to obtain a writ in the Royal Courts of Justice declaring that his father was dead, on the basis that he had not been seen alive for at least seven years.(NEIL MUNNS/PA Archive/Press Association Images)

    • Lord George Bingham, heir to Lord Lucan dated 14.02.95 : Lord Lucan's son was today (Sunday) warned he faced a protracted struggle lasting several years in his apparent attempt to assume the title of his missing father. To become the Eighth Earl of Lucan, Lord Bingham would seek to obtain a writ in the Royal Courts of Justice declaring that his father was dead, on the basis that he had not been seen alive for at least seven years.(NEIL MUNNS/PA Archive/Press Association Images)

    • 72A Elizabeth Street in London, home of Lord Lucan (Tophams/Topham Picturepoint/Press Association Images)

    • Miss Susan Mayor, who runs the costume department at Christie's, with Lord Lucan's coronet and robes which come up for auction on May 27th. They are expected to fetch between 2-300 and the money will go towards paying the missing peer's creditors (PA Archive/Press Association Images)

    • Mr Roger Rivett, husband of Sandra Rivett whom Lord Lucan was accused of murdering (his children's nursemaid) (Tophams/Topham Picturepoint/Press Association Images)

    • Lord Lucan's gambling friend Mr Ian Maxwell-Scott in Uckfield, where at the Magistrates Court he was given three weeks to pay off a rates debt - or face jail (Lord Lucan's gambling friend Mr Ian Maxwell-Scott in Uckfield, where at the Magistrates Court he was given three weeks to pay off a rates debt - or face jail)

    • Leaving a public house in Westminster today,Mrs Susan Maxwell-Scott and her husband Ian. Mrs Maxwell-Scott was the last person to see Lord Lucan after the murder of his children's nanny in Belgravia last November. She is due to give evidence at the resumed inquest on Mrs Sandra Rivett, at the Westminster Coroner's court. The Maxwell-Scott's home is only 16 miles from where Lord Lucan's car was found at Newhaven. he has not been seen since. (PA Archive/Press Association Images)

    • Company director Mr William Shand Kydd who gave evidence at the Westminster inquest on any Mrs Sandra Rivett, 29, who was found battered to death at the Belgravia home of Lord Lucan's estranged wife (Tophams/Topham Picturepoint/Press Association Images)

    • Veronica Lucan, the Dowager Countess of Lucan. Her husband Lord Lucan vanished from their home in 1974, leaving the murdered body of their nanny in the basement. (Photo by John Downing/Getty Images)

    • 17th July 1975: The Dowager Countess of Lucan and William Shand-Kydd brother in-law to Lord Lucan's wife, leaving for the court inquest on Sandra Rivell. (Photo by Keystone/Getty Images)

    • 17th June 1975: Susan Maxwell-Scott, who gave evidence at the inquest into the death of Sandra Rivett, the nanny who worked for Lord Lucan. (Photo by Keystone/Getty Images)