Independent body established by the UK Parliament. Website provides access to local, national, devolved assembly and European Parliament elections since 2005. Also available is data on political spending and analysis of the election campaigns.
House of Commons Library Research Papers
Produced by staff of the House of Commons Library to brief MPs, these regularly cover by-elections, general elections and devolved assembly elections, offering facts and figures on seats, votes cast and party representation.
Elections Centre at the University of Plymouth
Collates and analyses electoral data with a particular emphasis on local elections. Some results online. Also Produces the Local Elections Handbook, published annually since the 1980s, which is a comprehensive source of voting and electoral statistics for every local authority in Great Britain.
Several good printed series held by major research libraries and traceable via COPAC are
Times Guide to the House of Commons
Long established series, written by Times political journalists. Copies cover most general elections since 1885, offering election results, analysis, manifestos since 1950 and biographies of candidates.
Series of volumes containing full election results; plus scholarly essays analysing key themes. Volume 1 edited by FWS Craig and published by Parliamentary Research Services in 1977 covered the general elections of 1974; subsequent volumes (compiled by different editors) covered the succeeding elections
British Election Study
Long established study of the attitudes and behaviour of the electorate. Covers general elections from 1963 onwards. Information, research papers and some quantitative data can be downloaded from the website. Earlier sets can be obtained via the ESDS data service