Liz Truss promised U.K. a shakeup — but was forced out instead

Liz Truss became prime minister on a promise to open a new era of growth by shaking up Britain’s economy

Liz Truss became prime minister on a promise to open a new era of growth by shaking up Britain's economy. But the tumult that resulted was not exactly what she had in mind: Markets recoiled, the pound currency dived, her party revolted — and, in the end, she announced her resignation just 45 days after taking office.

Ms. Truss, 47, was forced to quit after an ill-conceived economic stimulus plan she drew up caused economic and political chaos and wiped out her support in the Conservative Party.

Ms. Truss, a libertarian who fervently believes in small government and free-market economics, came to office on September 6 after 1,72,000 Conservative Party members voted in an internal leadership contest to pick a successor to the scandal-plagued Boris Johnson.

Ms. Truss was in many ways the opposite of the populist, people-pleasing Mr. Johnson. Serious and stiff as a public speaker, she called herself a “disruptor," ready to upend existing economic “orthodoxy.” On the campaign trail, Ms. Truss, who was then foreign secretary, vowed to slash taxes and red tape “from day one,” boost investment and turn Britain’s faltering economy around.

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Her views appealed to many Conservatives, who backed her with a 57% majority over rival Rishi Sunak, a former Treasury chief who warned against radical tax cuts. Many saw in her echoes of former Prime Minister Margaret Thatcher, whom Ms. Truss admired — and sometimes emulated in her style of dress and poses on Instagram.

In the first days of her premiership, she gave a taste of things to come when she said she wasn’t afraid to make “unpopular” decisions — such as removing a cap on bonuses for bankers — to boost the U.K.’s competitiveness.