Speaking at a conference centre in Westminster, she thanked Sunak for a "hard-fought campaign" and pledges to deliver a "bold plan".

Truss will become prime minister on Tuesday after travelling to meet the Queen at Balmoral in Scotland.

The current foreign secretary will come under immediate pressure to announce a plan to tackle soaring energy costs
She is understood to be considering a freeze on energy bills, with an announcement potentially scheduled for Thursday
Labour argues people are "desperate" for help and need to know specifics