Marginal seats

This note lists UK Parliament seats by marginality using results for the 2005 General Election. Majorities are measured by both numbers of votes and shares of the vote in percentage points. The accompanying tables are presented in two sections: the first contains results based on actual 2005 results, the second presents notional results on the new boundary basis for parliamentary constituencies in England and Wales. Notional results have been extracted from the dataset kindly supplied by Colin Rallings and Michael Thrasher used in the compilation of the Media Guide to the new parliamentary constituencies (2007).