The results of publicised opinion polling for individual constituencies are detailed in this article.
Opinion polls have been conducted from the months following the previous general election held in October 2008, and have increased in frequency leading up to the general election.
The constituencies polled are not necessarily representative of a national average swing.
Under the first-past-the-post electoral system the true marginal seats, by definition, will be decisive as to the outcome of the election.
Notes Bold indicates parties with members elected to the House of Commons.