The windfall tax will be expanded to electricity generators with a levy of 45% being applied from Jan. 1 to revenues the government deems "extraordinary", from low carbon power generators such as wind and nuclear. The two measures are expected to raise around 14 billion pounds for 2023/24 fiscal year, a treasury document showed. Treasury documents show the 45% tax on low-carbon power generators would apply to revenue made on power generation at an average price over 75 pounds per megawatt hour (MWh). OIL AND GAS WINDFALLThe higher windfall tax on oil and gas producers will take effect on Jan. 1. Rival BP (BP.L) plans to spend 18 billion pounds by 2030 in Britain.

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