SNP MPs have been called on to reconsider their opposition to a windfall tax on big oil and gas companies.
Labour and the Lib Dems back a one-off windfall tax on the profits made by the rise in wholesale energy prices to help offset the steeply rising domestic bills expected this year.
Bernard Looney, the chief executive of BP, has described the energy giant as a “cash machine” after soaring oil and gas prices boosted profits.