Final answer:
The reform bills in Britain during the late nineteenth century led to increased political representation.
Step-by-step explanation:
The best impact of the reform bills in Britain during the late nineteenth century was increased political representation. The Great Reform Bill of 1832 expanded the electorate to include the urban middle class, and later reforms in 1867 allowed many working-class men to gain the right to vote. These reforms led to a more inclusive and democratic political system in Britain.