Daily Politics mood box: Are voters fixed or floaters?

Pundits and politicians would normally be speculating about when the prime minister was going to announce the date of the next general election.

But a fixed-term parliament meant the date of 7 May 2015 has been in the diary for years, leading to talk about whether voters have already made up their minds, or whether votes are still up for grabs.

Adam Fleming took the mood box - an unscientific test with plastic balls - to find out.

More mood box films from 2013, 2012, 2011 and 2010.

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