Why was there an increasing level of intervention by central and local government to improve working class housing during the period 1834-1948?

In 1834 the government did not consider the conditions under which the working class were housed to be a matter in which it should be involved. Yet by 1948 the state of housing was one of the major issues on the political agenda. The period between these dates saw a progressive involvement of both national and local government in the living conditions of the working class. This essay will explore the reasons why this gradual governmental intrusion evolved.

A primary reason why both central and local government became more concerned about the state of working class housing was a consequence of political developments….(short extract)