Prime Minister Boris Johnson will promise on Sunday to take "big, bold decisions" to transform post-Covid Britain, hoping to set the tone of the governing Conservative Party's conference already buffeted by fuel, gas, and Christmas food crises.

Johnson had wanted to use the conference this week to turn the page on more than 18 months of Covid-19 and to refocus on his 2019 election pledges to tackle regional inequality, crime, and social care.

Instead, the prime minister finds himself on the...