The Communist Party of Great Britain was the largest communust party in the UK. It was founded in 1920 as a merger of several smaller Marxist organisations, respondong to the Communist International's call to establish communist parties in each country. The party disbanded in 1991, with different factions forming the Communist Party of Britain in 1988 and the Democratic Left in 1991.

The national records of the party are held at the Labour History Archive and Study Centre, in the People's History Museum in Manchester, but MML does hold a number of collections relating to local party activity and individual party members.

We hold collections for the following groups within the CPGB:

Bethnal Green Branch

Colchester Young Communist League

Hornsey Branch

Kent District

North West area

Patcham Branch

National Education Advisory Committee