Browse the 2010 constituencies and use the three-way swingometer to see how different scenarios affect the outcome. This map is based on 2005 figures, notional or actual, and does not take account of byelection results. Full explanation here
Sources and methodology for our election 2010 swingometer map
We explain how our interactive swingometer map works, and what sources it is based upon
Election live with Andrew Sparrow
Follow the twists and turns of the day's campaign in our running live blog
Data from seven key polls in the run-up to the 2010 general election
The best of the general election campaign out there, supplied by readers and Guardian journalists
A Guardian and Observer archive in words and pictures documenting key moments from the build-up to Britain's general election