Chief scientist at Greenpeace UK - Dr Doug Parr - has said the energy industry needs "real change," rather than an investigation by the Competition and Markets Authority.
What UK consumers need from this investigation is more than yet another ineffectual slap on the wrist for the big six's cartel.
We need real change to the market so that companies offering a better deal for customers and the environment are no longer shut out of the market, but more importantly we need to clear the way for alternative business models to the big utilities.
More top news
Made In Chelsea star Mark-Francis Vandelli has become the fourth celebrity to withdraw from the winter sports programme.
A woman escaped without serious injuries after plummeting 60ft over the side of a balcony in John Lewis - and landing on a display bed.
Syrians fleeing Aleppo in shabby winter coats are still waiting to see whether Turkey will offer them refuge.