British Prime Minister Boris Johnson, after announcing his resignation as Conservative leader on Thursday, held phone talks with Ukrainian President Volodymyr Zelenskyy.

Johnson promised Zelenskyy that he will continue to work with partners to end the grain blockade in the coming weeks, a spokesperson for Johnson said.

Zelenskyy expressed his gratitude to Johnson for the "decisive and uncompromising" support for Ukraine, according to the Ukrainian president's office.