How not to be wrong about politics?
Some may think political manifestos and the weather on polling day can make a big difference to the outcome of elections. But it could a lot simpler than that according to academics Phil Cowley and Rob Ford.
Daily Politics reporter Ellie Price mines the archives to challenge political myths, and find out why candidates may be wasting their time, as they have less influence over the voters than they think.
Some images courtesy of Pathé.