It may be a new year, but the energy debate has picked up where it left off in 2013. Yesterday, the Labour party accused the ‘big six’ energy companies of overcharging their customers by a total of £4 billion. Labour, Ofgem, and the energy industry are all calling for greater transparency in the energy market. Until that happens, politicians and commentators are forced to make do with the data available to them – as Labour has this week – to try and work out whether consumers are getting value for money. As such, it seems unlikely the big six are overcharging consumers by precisely £4 billion as there are too many unknown factors. But Labour’s analysis highlights just how hard it is to know whether consumers are getting a good deal in the current energy market.