British Prime Minister Andy Burnham assured US President Donald Trump that London would be committed to defense and security and would help support the

The incoming PM said that he planned to be ‘upfront’ with the US president, who has threatened to target Iran’s civilian infrastructure.

The United Kingdom's new Prime Minister Andy Burnham delivers a speech outside 10 Downing Street in London after taking office on Monday. [Isabel Infantes / REUTERS]

Burnham said Trump and Ukrainian President Zelensky would be among the first world leaders he would contact as prime minister.