The two major parties in great britain are the parties.

The two major parties in Great Britain are the Labor and Conservative parties.

Explanation:

-The Conservative Party in the United Kingdom is the largest right-wing party in British politics.

The Conservative Party is the largest political party in the UK, measured in terms of parliamentary representatives, the largest measured in the number of members, the largest measured in incumbents in local government and the country's oldest political party. It is the UK's most successful political party, measured in terms of electoral victory.

- The Labor Party is a British Social Democratic political party. The party was formed in 1900 as a loose association of political and professional organizations to represent the labor movement in the Lower House. Until 1922, the Conservatives and Liberals were the two largest parties, but this year Labor Liberals took the place of party number two, but only gained the majority for the first time after 1945.

answer; because they must appeal to a broad cross-section of the population;