James Charteris, 13th Earl of Wemyss

He later married Amanda Feilding in January 1995. She founded and directs the Beckley Foundation, a charitable trust which carries out pioneering scientific research into psychoactive drugs and consciousness, and promotes evidence-based, health-oriented drug policy reform. They live at Stanway House in Gloucestershire and at Gosford House in East Lothian.

Wemyss is the second son of Francis David Charteris, 12th Earl of Wemyss, and his first wife, Mavis Murray. He was educated at Eton College. While a teenager he was Page of Honour to the Queen Mother. He went to Oxford (BA 1969, MA 1974), obtaining a DPhil from St Antony's College in 1975. He obtained a diploma from the Royal Agricultural College in 1978. He is known to have undergone an operation of trepanation, the practice of drilling holes in the head, in 1996 in Cairo. He said, "It seemed to be very beneficial."

He became heir apparent to the Earldoms of Wemyss and March on the death of his elder brother, Iain David Charteris, Lord Elcho, in 1954. He was subsequently known as Lord Neidpath as opposed to the usual courtesy title of Lord Elcho. He was appointed a Deputy Lieutenant of Gloucestershire in 2005, and is a supporter of UKIP, to whom he has made at least £54,000 in donations.

He married the Hon. Catherine Guinness (born 1952), daughter of Jonathan Guinness, 3rd Baron Moyne (and granddaughter of Diana Mitford and Bryan Guinness), in July 1983. They have a son, Francis Richard (Dick) Charteris, Lord Elcho (b. 1984), who is the heir to the earldoms, and a daughter, Lady Mary Olivia Charteris, a model and singer. James and Catherine were divorced in 1988, and she married Robert Hesketh in 1990.

James Donald Charteris, 13th Earl of Wemyss and 9th Earl of March, DL (/ˈtʃɑːrtərɪs/; born 22 June 1948), also known as Jamie Neidpath, is a British peer and landowner.