Question: What English author won a Carnegie Medal for his story about Nobody Owens?

Context articles: Jan Mark
Elizabeth Goudge
Tulku (novel)
Agnes Allen (author)
The Graveyard Book
Bernard Ashley (author)
Henrietta Branford
The Midnight Charter
Richard Armstrong (author)
Philippa Pearce

Jan Mark (22 June 1943 – 16 January 2006) was a British writer best known for children's books.
 In all she wrote over fifty novels and plays and many anthologised short stories.
 She won the annual Carnegie Medal from the Library Association, recognising the year's best children's book by a British subject, both for "Thunder and Lightnings" (1976) and for "Handles" (1983).
 She was also a "Highly Commended" runner up for "Nothing To Be Afraid Of" (1980).
 She has won the Carnegie Medal twice, and no one has won three Carnegies.
Elizabeth de Beauchamp Goudge FRSL (24 April 1900 – 1 April 1984) was an English author of novels, short stories and children's books as Elizabeth Goudge.
 She won the Carnegie Medal for British children's books in 1946 for "The Little White Horse".
 She was a best-selling author in both the UK and the US from the 1930s through the 1970s.
Tulku is a children's historical novel by Peter Dickinson, published by Gollancz in 1979.
 Set in China and Tibet at the time of the Boxer Rebellion, it features a young teenage boy orphaned by the violence, who flees with others to a Buddhist monastery.
 Dickinson and "Tulku" won two major awards for British children's books, the Whitbread Children's Book Award and the Carnegie Medal.
 The Carnegie Medal from the Library Association then recognised the year's outstanding children's book by a British subject.
Agnes Allen (1888 – 1958) was an English author of children's books.
 She won the Carnegie Medal for British children's books in 1949 for "The Story of Your Home".
The Graveyard Book is a children's fantasy novel by the English author Neil Gaiman, simultaneously published in Britain and America during 2008.
 "The Graveyard Book" traces the story of the boy Nobody "Bod" Owens who is adopted and raised by the supernatural occupants of a graveyard after his family is brutally murdered.
Bernard John Ashley (born April 1935) is a British author of books for children and young adults.
 His debut novel, "The Trouble with Donovan Croft", published in 1974, won "The Other Award", an alternative to the Carnegie Medal.
 "A Kind of Wild Justice" (1978), "Running Scared" (1986), and "Little Soldier" (1999) were commended runners up for the Carnegie Medal from the Library Association, recognising the year's best children's book.
 The first two have been reissued by OUP in their Children's Modern Classics series, the third re-issued in a 15th anniversary edition.
 Ashley's TV drama "Dodgem" (based on his own novel) won the Royal Television Society Award for Best Entertainment programme (BBC) in 1993.
Henrietta Diana Primrose Longstaff Branford(12 January 1946 – 23 April 1999) was an English author of children's books.
 Her greatest success was "Fire, Bed and Bone" (1997), a historical novel set during the English peasants' revolt of 1381.
 For that she won the Guardian Children's Fiction Prize, a once-in-a-lifetime book award judged by a panel of British children's writers, and she was a highly commended runner up for the Carnegie Medal from the Library Association, recognising the year's best children's book by a British subject.
The Midnight Charter is a young adult fantasy novel by David Whitley.
 It is the first novel in the Agora Trilogy, and the author's debut novel.
 It was nominated for the 2010 Carnegie Medal, but lost to Neil Gaiman's "The Graveyard Book".
Richard Armstrong (18 June 1903 – 30 May 1986) was an English author who wrote for both adults and children.
 Most of his books were novels set at sea, or sea stories.
 For one of those, "Sea Change", he won the 1948 Carnegie Medal from the Library Association, recognising the year's best children's book by a British subject.
 He is also known for a biography of Grace Darling in which he challenges the conventional story: "Grace Darling: Maid and Myth" (1965).
 He is often described on the cover of his books as "author and mariner".
Ann Philippa Pearce OBE (22 January 1920 – 21 December 2006) was an English author of children's books.
 Her most famous work is the time slip fantasy novel "Tom's Midnight Garden", which won the 1958 Carnegie Medal from the Library Association, as the year's outstanding children's book by a British subject.
 Pearce was a commended runner-up for the Medal a further four times.