Housing Act 1930

The Housing Act 1930 otherwise known as the Greenwood Act, is an Act of Parliament in the United Kingdom.It encouraged mass slum clearance and councils to set to work to demolish poor quality housing and replace it with new build. Subsidies for general housing, were given, these were calculated on the number of people rehoused not the number of properties demolished.

The recession was ending: this was an Act of a Labour government. The minister to steer it through the house was Arthur Greenwood.

...
Wikipedia