He died after November 1974, when he went missing after murdering the family's nanny.
Officialy declared dead in 1999.
He was educated at Eton College, Windsor, Berkshire, England.
He gained the rank of Lieutenant in the service of the Coldstream Guards.
He succeeded to the title of 13th Baronet Bingham, of Castlebar, co. Mayo [N.S., 1634] on 21 January 1964.
He succeeded to the title of 7th Earl of Lucan [I., 1795] on 21 January 1964.
He succeeded to the title of 3rd Baron Bingham, of Melcombe Bingham, co. Dorset [U.K., 1934] on 21 January 1964.
On 11 December 1992 he was declared legally deceased by the High Court, Chancery Division.
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On the evening of 7 November 1974, the children's nanny, Sandra Rivett, was bludgeoned to death in the basement of the Lucan family home. Lady Lucan was also attacked; she later identified Lucan as her assailant. As the police began their murder investigation, Lucan telephoned his mother, asking her to collect the children, and then drove a borrowed Ford Corsair to a friend's house in Uckfield, Sussex. Hours later, he left the property and was never seen again. The Corsair was later found abandoned in Newhaven, its interior stained with blood and its boot containing a piece of bandaged lead pipe similar to one found at the crime scene. A warrant for Lucan's arrest was issued a few days later, and in his absence the inquest into Rivett's death named him as her murderer, the last occasion in Britain when a coroner's court was allowed to make such a determination.