When looking at the composition of the parties in the 1979 general election, the Conservative Party (a political party in the United Kingdom who sit on the centre-right of the British political spectrum) had the most members, with 339, followed by the Labour party, who had 269.
Conservative 339 The Conservative Party, officially the Conservative and Unionist Party, and also known colloquially as the Tories or simply the Conservatives, is a political party in the United Kingdom. Ideologically, the Conservatives sit on the centre-right of the British political spectrum. Labour 269 
