Consider reasons why turnout may differ significantly between different constituencies at general elections to the Westminster Parliament.

A key factor affecting turnout levels between consistencies stems from the majoritarian 'First Past The Post' electoral system that is employed in general elections. The 'winner takes all' nature of the First Past The Post system causes many votes to be 'wasted', especially in constituencies which are considered 'safe seats' for a particular Parliamentary Party. Therefore, because the voters in a certain 'safe seat' constituency feel as if the result is a forgone conclusion, and that a vote for a rival political party would be 'wasted', this could lead to discrepancies in voter turnout between constituencies.
Another variable to be considered when explaining variation in turnout levels is the local economic condition; for example, unemployment is a useful indicator of turnout levels. A constituency with a high level of unemployment often has a lower turnout, mainly because voters are more likely to feel disenfranchised with the political system. Conversely, a constituency with high levels of employment often has a higher turnout, because constituents feel like they benefit from positive political decisions and are likely to own assets that would change depending on governmental policy.