Britain laid out plans on Thursday to boost its energy security and independence through investment in moving towards cleaner, more affordable energy sources.
Wholesale gas and electricity prices in Europe surged after Russia's invasion of Ukraine last year and the British government has been subsidising household and business energy bills since October.
The plans included a raft of previously announced schemes such as funding for offshore wind, carbon capture and new green hydrogen production projects.
It also pledged to speed up planning processes for solar and offshore wind projects, roll out more electric vehicle charging points and encourage heat pumps in homes.
However, the government's energy policy dealt a blow to those projects which were not immediately selected for financial support, including British power generator Drax and its method of carbon capture - bioenergy with carbon capture and storage (BECCS).
Its shares were down 10%.
"Transforming our energy system is no longer just about tackling climate change, it is also a matter of national security," finance minister Jeremy Hunt said in a statement.
"To protect ourselves from future price spikes, we need to accelerate the move to cleaner, cheaper, home-grown energy."
Energy Security minister Grant Shapps said the new plan included 70 different policies that would improve energy security.
He told LBC Radio that households would not be penalised if they do not switch from gas heating to lower emissions heat pumps, something some newspaper headlines had said was possible.
The opposition Labour Party and campaign groups criticised the plan for not including new money, and failing to set out a response to the US $369 billion Inflation Reduction Act (IRA) of green subsidies.
Hunt told a parliamentary committee on Wednesday that the government would lay out its response to the IRA in the autumn.
"What was billed with huge hype as the government’s 'green day' turns out to be a weak and feeble groundhog day of re-announcements, reheated policy, and no new investment," Labour Party climate and net zero spokesman Ed Miliband said.
Over the past year, Britain has introduced windfall taxes on oil and gas as well as on renewables, which companies say stifles investment and in turn is likely to increase Britain's dependence on imported fuels and derail its climate targets.
Oil and gas producers had called for floor prices to be applied to the windfall tax, and renewable power companies wanted better investment incentives, neither of which featured in the plans outlined in advance by the government.