Watchdog clears way for merger of energy giants

logos for the 'Big Six'; energy companies (top row from left) British Gas, EDF, RWE npower, (bottom row from left) SSE, E.ON and ScottishPower.
logos for the 'Big Six'; energy companies (top row from left) British Gas, EDF, RWE npower, (bottom row from left) SSE, E.ON and ScottishPower.

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