The Energy Secretary is understood to have told Miatta Fahnbulleh - the minister for energy consumers - that she needs to prioritise cutting bills to meet his pledge to save households £300.
The supermarket giant, which runs Sainsbury's Energy, is offering customers the incentive to encourage home upgrades with a focus on slashing bills and improving energy efficiency (stock image).
The Energy Secretary once threatened to resign over proposals for a third runway, but has been conspicuously quiet since Rachel Reeves 's announcement.
The Energy Security and Net Zero Secretary told MPs that building a third runway at Europe's busiest airport 'must be justified within carbon budgets'.
When he was Labour leader, the Energy Secretary Ed Miliband mocked Tory Prime Minister David Cameron for hiring a vanity photographer at public expense.