It's a mystery.
Compare and contrast. In the euro area, falling energy prices are cited as one of the reasons why the annual inflation rate has dropped to a four-year low of 0.7%.
The best part of Ed Miliband's new energy policy is the plan to abolish Ofgem.
The City watchdog, the Financial Services Authority, is investigating claims by a whistleblower that Britain's £300bn wholesale gas market has been "regularly" manipulated by some of the big power companies, exploiting weaknesses that echo the recent Libor scandal.