The poll findings will be reported at 5.05pm on each day of the Labour and Tory party conferences on the YouGov site as well as on 'Sky Live at 5', except on the days the leaders speak, when it will be brought forward to 12 noon.
These party conferences will be the last before a general election next year. Prime minister Gordon Brown needs to prove to the public and his party that he is the man to lead them to a fourth victory, while David Cameron needs to consolidate the gains in popularity that the Conservatives have made since Tony Blair stepped down.
Stephan Shakespeare, co-founder and chief innovation officer at YouGov, said: "Traditionally polls have provided occasional snapshots to measure this process, rather than the continuous stream it demands. Our daily polling is reflecting the nature of public debate, and measuring it as it happens."
YouGov uses online panels to provide quantitative and qualitative research on a range of topics from politics to technology.
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