Question: What British physicist who shared the Nobel Prize in Physics in 1951 and has works housed at the Churchill Archives Centre? 

Context paragraphs:
Nobel Prize in Literature: Since 1901, the Nobel Prize in Literature (Swedish: "Nobelpriset i litteratur" ) has been awarded annually to an author from any country who has, in the words of the will of Alfred Nobel, produced "in the field of literature the most outstanding work in an ideal direction" (original Swedish: "den som inom litteraturen har producerat det mest framstående verket i en idealisk riktning").  Though individual works are sometimes cited as being particularly noteworthy, here "work" refers to an author's work as a whole.  The Swedish Academy decides who, if anyone, will receive the prize in any given year.  The academy announces the name of the chosen laureate in early October.  It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895; the others are the Nobel Prize in Chemistry, Nobel Prize in Physics, Nobel Peace Prize, and Nobel Prize in Physiology or Medicine.

Abdus Salam: Mohammad Abdus Salam {'1': ", '2': ", '3': 'NI, SPk, KBE', '4': "} (Punjabi, Urdu: ‎ ; ] ; 29 January 192621 November 1996), was a Pakistani theoretical physicist.  A major figure in 20th century theoretical physics, he shared the 1979 Nobel Prize in Physics with Sheldon Glashow and Steven Weinberg for his contribution to the electroweak unification theory.  He was the first Pakistani and first Muslim to receive a Nobel Prize in science and the second from an Islamic country to receive any Nobel Prize (after Anwar Sadat of Egypt).

John Cockcroft: Sir John Douglas Cockcroft, (27 May 1897 – 18 September 1967) was a British physicist who shared the Nobel Prize in Physics in 1951 for splitting the atomic nucleus with Ernest Walton, and was instrumental in the development of nuclear power.

Brian Josephson: Brian David Josephson, {'1': ", '2': ", '3': ", '4': "} (born 4 January 1940), is a Welsh theoretical physicist and professor emeritus of physics at the University of Cambridge.  Best known for his pioneering work on superconductivity and quantum tunnelling, he was awarded the Nobel Prize in Physics in 1973 for his prediction of the Josephson effect, made in 1962 when he was a 22-year-old PhD student at Cambridge University.  Josephson is the only Welshman to have won a Nobel Prize in Physics.  He shared the prize with physicists Leo Esaki and Ivar Giaever, who jointly received half the award for their own work on quantum tunnelling.

John Martin (civil servant): Sir John Miller Martin (15 October 1904 – 31 March 1991) was a British civil servant who served as Principal Private Secretary to the Prime Minister, Winston Churchill, during World War II.  The position is a public, rather than private post.  He was present at the most important strategic conferences and was knighted in 1952.  The Churchill Archives Centre holds two boxes of his papers.

Nobel Prize in Physics: The Nobel Prize in Physics (Swedish: "Nobelpriset i fysik" ) is a yearly award given by the Royal Swedish Academy of Sciences for those who conferred the most outstanding contributions for mankind in the field of physics.  It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895 and awarded since 1901; the others being the Nobel Prize in Chemistry, Nobel Prize in Literature, Nobel Peace Prize, and Nobel Prize in Physiology or Medicine.

Aage Bohr: Aage Niels Bohr (] ; 19 June 1922 – 8 September 2009) was a Danish nuclear physicist who shared the Nobel Prize in Physics in 1975 with Ben Mottelson and James Rainwater "for the discovery of the connection between collective motion and particle motion in atomic nuclei and the development of the theory of the structure of the atomic nucleus based on this connection".  Starting from Rainwater's concept of an irregular-shaped liquid drop model of the nucleus, Bohr and Mottelson developed a detailed theory that was in close agreement with experiments.  Since his father, Niels Bohr, had won the prize in 1922, he and his father were one of the six pairs of fathers and sons who have both won the Nobel Prize and one of the four pairs who have both won the Nobel Prize in Physics.

William Henry Bragg: Sir William Henry Bragg (2 July 1862 – 12 March 1942) was a British physicist, chemist, mathematician and active sportsman who uniquely shared a Nobel Prize with his son William Lawrence Bragg – the 1915 Nobel Prize in Physics: ""for their services in the analysis of crystal structure by means of X-rays"".  The mineral Braggite is named after him and his son.  He was knighted in 1920.

Churchill Archives Centre: The Churchill Archives Centre (CAC) is one of the largest repositories in the United Kingdom for the preservation and study of modern personal papers.  It is best known for housing the papers of Sir Winston Churchill, the private papers of Baroness Thatcher, and a wide range of political, diplomatic, military and scientific collections, including such well-known modern personalities as: Ernest Bevin, Enoch Powell, Lord Kinnock, Sir John Colville, Lord Hankey, Admiral Lord Fisher, Field Marshal Lord Slim, Sir John Cockcroft, Sir James Chadwick, Professor Lise Meitner, Dr Rosalind Franklin and Sir Frank Whittle.

West Indies Federal Archives Centre: The West Indies Federal Archives Centre is the official depository of records from the defunct West Indies Federation.  The Centre was opened in 2004, and is part of the University of the West Indies Cave Hill campus in Barbados.  Prior to the Centre's opening, the West Indies archives were held by the Barbados National Archives.

Supporting paragraphs: Churchill Archives Centre John Cockcroft
Answer: John Cockcroft