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Energy bills could rise again

Millions of households are being warned their energy bills may have to go up even though suppliers face the prospect of increased profits, according to a new report by regulator Ofgem.

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How National Grid copes with a shortage of electricity

System operator National Grid can use a number of ways to control the supply of electricity if there is a spike in demand:

  • It can lower the voltage, which means households may notice lights dimming or flickering
  • Industrial customers can also be asked to come off the supply to protect households

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