Labour is set to call for the energy price cap to be frozen at its current level of £1,971 as UK households struggle to pay their bills.
The move to block an expected increase to £3,300 in October is expected to put further pressure on the two Tory leadership contenders.
A think-tank has warned households on low incomes will have to reduce their spending power by three times as much as high income households in order to afford their energy bills this winter.
Labour leader Keir Starmer will call for the price-cap freeze when he sets out details of his party’s plans, including how they will pay for the measure.
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