An Ofgem director has quit over the electricity and gas regulator’s decision to change the way it calculates the energy price cap, which she said will lead to much higher bills.

The regulator confirmed to Sky News that Christine Farnish had stepped down from the board after disagreeing with the rest of its members over how long energy suppliers should have to recoup the current high energy prices.

She wanted suppliers to recoup those prices, which are a condition of the price cap, over 12 months to spread out the cost to customers.

However, the rest of the board, Ofgem said, wanted that to take place over six months as they said that would reduce the “very real risk of suppliers going bust”.

Ms Farnish, who has been a non-executive director since 2016, told The Times she resigned because she did not believe Ofgem had “struck the right balance between the interest of consumers and the interests of suppliers”.

This month, Ofgem announced it was changing the methodology of the cap to enable suppliers to recoup wholesale energy heading costs sooner.

Ms Farnish said she believed the move “would add several hundred pounds to everyone’s bill in order to support a number of suppliers in the coming months”.

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Investec analysts estimated the change in method would add more than £400 to the level of the price cap in January – taking it to £4,200 a year compared to £1,971 at present.

Ofgem said: “We are thankful to Christine for her many years of devoted service to Ofgem.

“Due to this unprecedented energy crisis, Ofgem is having to make some incredibly difficult decisions where carefully balanced trade-offs are being weighed up all the time. But we always prioritise consumers’ needs both in the immediate and long term.

“The rest of the board decided a shorter recovery period for energy costs was in the best interest of consumers in the long term by reducing the very real risk of suppliers going bust, which would heap yet more costs onto bills and add unnecessary worry and concern at an already very difficult time.”

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