For one thing the basic commodity price has not risen by 9%.
That's a big issue. As far as I can see, we don't actually know how much these companies pay for their gas. Do you?
Of course the real answer is to cut our reliance on imported energy, which is why we have to go nuclear, shale gas, wind, hydro, tidal etc. Unless of course that nice Mr Miliband is able to reverse the effects of say gravity. He has as much chance of doing that as he has in trying to freeze gas prices.
Actually I do know a lot about the gas supply industry, I work for a large gas consumer and the gas price is linked heavily to our production costs. the commodity price has not increased considerably over the last year certainly nowhere near 9%. (Now you can believe that I'm taking Internet ###### if you want but don't even think I'm going to give out our gas prices on this forum)
Of course we will use the 'increase in gas prices to justify out lack of profits etc'.
There is another player in this game that is stealing money and that is the compleat private monopoly of National Grid, creaming a cut off every MJ i of gas whilst not maintaining an ageing supply network.