US President Donald Trump has again lashed out at London Mayor Sadiq Khan over his assurances to Londoners following Saturday's terror attack.

He accused Mr Khan of offering a "pathetic excuse" for saying there was no reason for people to be alarmed. Lord Ricketts, who was national security adviser to David Cameron between 2010-2012, called this an "extraordinary intervention" in British affairs at a very sensitive moment.

(Image: Donald Trump and Sadiq Kahn, credit: Reuters)