Sajid Javid has resigned as chancellor as Boris Johnson carries out a post-Brexit cabinet reshuffle.
Mr Javid rejected an order to fire his team of aides, saying "no self-respecting minister" could accept such a condition.
He has been replaced as chancellor by Chief Secretary to the Treasury Rishi Sunak - who just seven months ago was a junior housing minister.
Mr Javid had been due to deliver his first Budget in four weeks' time.
The former home secretary was appointed chancellor by Mr Johnson when he became prime minister in July.
