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Gas and electricity customers 'do not understand' bills

29 October 2013 Last updated at 20:28 GMT

Many energy customers do not understand the details of gas and electricity bills, according to the group Consumer Futures in Wales.

It comes as MPs have been cross-examining energy bosses about their price increases.

Four of the big six companies have put bills up by an average of 9.1%.

Economics correspondent Sarah Dickins reports.

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