Opinion Poll Volatility

You can tell there’s an election in the offing, with numerous opinion polls published almost daily. But how do you explain the volatility?
Well it’s partly to do with differing methods used by each organisation to “weight” the raw data.
However I think it’s more to do with the credence given to minority parties such as the LibDems, BNP, SNP and UKIP.
No one honestly expects any one of their leaders to become Prime Minister next year, and yet people are confused.
Speaking to voters in the north of England such as Cheadle and Penistone & Stocksbridge, I find that a lot of people are still waivering between Brown and Cameron, and voting for some other party is seen as a middle way.
Soon it will be time to decide.