liz truss
A typical UK household will now pay no more than £2,500 a year on their energy bill for the next two years, from October.
Levelling up secretary Simon Clarke says failing to act would also do "enormous economic damage".
The new chancellor's comments emerged as Liz Truss prepares to lift the ban on shale gas exploration.
Pressure on Liz Truss and her response to soaring energy bills as the currency is down more than 15% against the "greenback" so far this year.
Supporters of Rishi Sunak have largely been banished to the backbenches.
Experts said it is "no surprise" that many consider Britain to be in decline.
Matthew Sinclair said the moves would help to slash public spending by £7 billion.
May's PMQs cameo left all of her Conservative colleagues cheering, but not everyone felt it was a good point.
In a leaked recording Truss suggested UK workers lacked the “graft” of rivals in other countries.
This is the first time no white men have occupied the "great offices of state".