While at Edinburgh University, he was President of the Liberal Club and editor of their magazine. He was Chairman of the University Liberal Club from 1935 to 1938. He was President of the Union of University Liberal Societies from 1937 to 1938. He wrote on political and social questions. In 1938 when Jo Grimond resigned as Liberal prospective parliamentary candidate for Aberdeenshire Central, Davies was selected to replace him for a general election expected to take place in 1939. However, in 1938 when a parliamentary vacancy opened at Oxford, and the incumbent Liberal prospective parliamentary candidate withdrew, Davies was selected by Oxford Liberals to contest the 1938 Oxford by-election. His only real connection with Oxford was that he had presided at a Liberal students' conference there earlier that year. Davies started his campaign but knew that the Conservative candidate would certainly hold the seat if the anti-government vote was split between himself and the Labour candidate. He offered to withdraw if the Labour candidate also withdrew in order for the two parties to support a joint candidate. This duly happened, but the Conservative still retained the seat against the political climate of Neville Chamberlain and his visit to Munich to meet Adolf Hitler. Davies resumed his role as prospective candidate for Aberdeenshire Central and eventually had the chance of contesting the seat at the 1945 General Election, but came third; In 1950 he had published Trial By Ballot, a book giving his insights into the British electoral and political scene from 1918 to 1950. Following boundary changes, he was Liberal candidate for the re-drawn Aberdeenshire West at the 1950 General Election. The new seat included part of the old Aberdeenshire Central seat where he stood in 1945. Despite this familiarity, he again came third; He was a member of the national executive committee of the United Nations Association. He did not contest the 1951 General Election. For the 1955 General Election, he was Liberal candidate for Oxford, where 17 years earlier he had briefly been candidate. He again finished third. At the 1959 General election he was again the Liberal candidate for Oxford, finishing third. In 1962 he was elected a member of Oxford City Council. At the 1964 General Election he fought Oxford for the third and final time, finishing third. He was always on the radical wing of the party and was in particular a supporter of nuclear disarmament being one time chair of Oxford CND. He was appointed a CBE for political and public service in 1984.
War service and family
During the war, Davies enlisted in the Royal Air Force and rose to Acting Flight Lieutenant, serving at home, in India and Burma where he was wounded. In 1940 he married Jean McLeod whom he had known from Edinburgh. They had two sons, Michael and John, who became a Labour Party politician, standing against Margaret Thatcher in Finchley in 1987 and a daughter Mary who like her father was president of the Edinburgh University Liberal Club and was an elected Liberal councillor in Havering.