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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.