Flanders became more and more influential in British industrial relations until his death. During this time, Flanders continued to co-edit the Socialist Commentary and released many publications in his journal, and remained loyal to the ISK. Flanders’ political activism continued in this time, as he sought to influence foreign policy, and in particular to counter support for the Soviet Union on the British left. In 1950, Flanders chaired the Socialist Union in order to work more closely with social democrats within the Labour Party shortly after their election in 1945. In 1956, the Socialist Union published Twentieth Century Socialism, which made the case for ethical socialism within the Labour Party. The group dissolved in 1959. In 1964, Flanders wrote The Fawley Productivity Agreements, which follows the Esso Fawley refinery’s objective to increase productivity levels. The Esso Fawley refinery in Hampshire, England is the largest oil refinery in the United Kingdom, and at the time of writing employed over 1,000 people. The Esso experiment addressed explicitly an industrial relations problem that was more general and symptomatic for the British industry, low productivity levels and enduring high levels of overtime work combined with low wages. The Fawley plant was a revolutionary subject in England at the time, as the agreements hovered around topics of collective bargaining on labour rights in the UK and the 40-hour work week. In 1965, Flanders published Industrial Relations: What is wrong with the system?. Again, Flanders stresses the importance of collective bargaining in the British industrial landscape. He also notes that job regulation is key in ensuring Britain remains on its trends of full employment in the post-World War II period. Flanders argues this is especially true of external regulation, which is key in ensuring proper employee-employer relations, but also of trade unions. Throughout his life, Flanders underwent changes to his political affiliations and foci. His political and intellectual development began with a focus on socialism, so much so that he migrated to Germany to join the ISK and pursue his interest in the topic through learning at the organization’s Walkemuhle, or training school at 18, in 1929. He continued to pursue and write on anti-Marxist, Leninist socialism for decades until the postwar 1940s when he worked for the UK government. However, Flanders maintained links to issues around socialism including in work during his academic career as well as returning to co-edit the Socialist Vanguard and Socialist Commentary from 1971 to his death. During his academic career, Flanders’ works looked at issues surrounding trade unions, management, and pragmatic reforms in government and in trade organizations.