British Foreign Secretary Liz Truss said Sunday that she would take immediate steps to tackle rising energy bills and increase energy supplies if she is expected to be appointed prime minister this week.

In her Sunday Telegraph article on the eve of the announcement of who will replace Prime Minister Boris Johnson, Truss repeated her pledge to be bold in addressing the problems of Britain's economy, which is struggling with double-digit inflation and facing the threat of recession.

Stating that she understands how difficult the cost-of-living crisis is for everyone, Truss wrote that she would take "decisive action to ensure families and businesses can get through this winter and the next."

"If elected, I plan within the first week of my new administration to set out our immediate action on energy bills and energy supply," she said. 

"A fiscal event would follow later this month from my Chancellor, with a broader package of action on the economy."

She said her approach will consist of two parts, immediate action to address the cost-of-living crisis and a plan for economic growth. She will also appoint a Council of Economic Advisers to get "the best ideas" on how to stimulate the economy.

On Monday, Truss is expected to be named the new leader of the ruling Conservative Party and thus the new British prime minister, defeating her rival, former finance minister Rishi Sunak.