In announcing his resignation, Johnson says he will stay in office until a new Conservative leader is elected in the coming months, possibly until October.

Andrei Kelin says Boris Johnson 'concentrated too much on the geopolitical situation, on Ukraine'.

Boris Johnson lasted three years as British prime minister but is now on the brink of resignation.

More than 50 ministers have quit the government in less than 48 hours, saying Johnson was not fit to be in charge after a series of scandals, while dozens in his Conservative Party are in open revolt.