Boris Johnson and Keir Starmer have again clashed over calls for a windfall tax on North Sea profits.
The Labour leader used yesterday's Prime Minister's Questions to go on the offensive over rising energy company revenues.
"A windfall tax would raise billions and ease the burden on working people," Mr Starmer said.
"The former chief executive office of BP, Lord John Browne, says a windfall tax is “justifiable”. The current CEO says that BP has, in his words, more cash than we know what to do with.
"Why is the Prime Minister more interested in shielding oil and gas profits than supporting working people?"
Mr Johnson said tax stability was stimulating investment in the North Sea to tackle the energy crisis.
He said: "That is a classic example of what Labour got wrong during its period in office. The oil and gas companies are now investing £20billion in ensuring that we have long-term energy supplies.
"I remember that the 1997 Labour manifesto actually said that there was 'no economic case' for more nuclear power. We are now having to make good the historic mistakes of the Labour party by investing in our long-term energy supply.
"That is what we are doing. Everything that Labour is proposing would deter investment, meaning higher prices for consumers and households up and down the land being worse off."
The SNP leader at Westminster, Ian Blackford, also criticised the government for failing to take action to tackle the cost of living crisis.
He called on the chancellor to turn his £200 energy bill loan into a grant to "finally put some cash into people’s pockets".