Former chancellor Kwasi Kwarteng will stand down at the next election.
Mr Kwarteng delivered the disastrous mini-budget, and was later sacked by then prime minister Liz Truss and replaced with Jeremy Hunt in a bid to reassure markets.
Mr Kwarteng has worked for various Conservative governments since 2015, including as a Brexit minister, a business minister, before being promoted to the cabinet as business secretary by Boris Johnson in January 2021.
A close ally of Ms Truss, he was a vocal supporter of her campaign to become leader of the Tory Party and the country, and she appointed him chancellor on 6 September 2022.
On 23 September 2022, Mr Kwarteng delivered the mini-budget – the economic plan promised by Ms Truss which her supporters claimed would grow the economy.
It followed the announcement of a plan to cap energy prices for a typical household to £2,500 amid surging costs.
What followed was market and political chaos, worries that pension firms would collapse, and ultimately the defenestration of the UK’s second shortest-lasting chancellor. Only Iain MacLeod, who died 30 days after taking the role in 1970, has spent less time in charge of the country’s finances.
The energy cap – which has since been estimated to have cost £21bn – and the mini-budget did not have the impact the Truss team thought they would. She had promised “supply-side reform” that would boost growth in her campaigns.
Rishi Sunak, who lost in a vote with Tory members to Ms Truss, repeatedly criticised her plans as not being financially sound.
This, alongside measures like the scrapping of the top rate of income tax and holding corporation tax at 19%, led to uncertainty about the UK economy and how money would be raised in the future.
Mr Kwarteng was forced to U-turn on the income tax pledged in the middle of that year’s Conservative Party conference.
He then attended an International Monetary Fund summit in the US – before cutting the trip short to return to the UK.