Answer:
Benjamin Disraeli
Step-by-step explanation:
The Prime Minister who was a member of the Conservative party and played a significant role in expanding voting rights in the United Kingdom was Benjamin Disraeli. Disraeli introduced the Reform Act of 1867, which aimed to increase the number of eligible voters in Britain by extending the right to vote to urban working-class men. The act enfranchised about one million additional male voters, and it is considered a major milestone in British political history. Disraeli's reform efforts were not just limited to voting rights, but he also advocated for better working conditions and social reforms for the working class, which earned him the nickname "the people's champion."