The file comprises papers concerning Plaid Cymru in the South Wales constituencies, 1960-1999. They include election addresses and leaflets circulated by the party in a number of constituencies during parliamentary and local election campaigns, Plaid Cymru publicity publications, and cuttings from newspapers. Many are from the General Election of 1970 and the Merthyr Tydfil by-election of 1972.

The file comprises miscellaneous election addresses and leaflets circulated in parts of South Wales during the May 1986 district council elections.

The series comprises local election leaflets, 1946-1947, c.1950-1992, (with gaps, mainly 1960s and 1970s), relating to Communist Party candidates in South Wales. Files WE 5/3-22 also include election results, and papers relating to the arrangements of the campaigns.