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