Normally MPs can submit letters of no confidence and if they reach the threshold - 15 per cent of Tory MPs - then a vote is called. If the PM loses that vote they are out.
Liz Truss walked in moments before the Chancellor started laying out the dramatic U-turns, and sat almost motionless for 30 minutes before scurrying out.
There were cheers in the Commons as Cabinet minister Penny Mordaunt - who has made no secret of her leadership ambitions - delivered a deadpan defence of Liz Truss.
The embattled Prime Minister was stopped in her tracks after being asked if she would definitely still be the Tory leader - facing a resurgent Labour party - when voters next go to the polls.
In an interview with the BBC the embattled Prime Minister said she has adjusted what we re doing after the Government s fiscal policies spooked the markets.