Labour leader strengthens his authority over the divided party after the most turbulent year in its history.

Jeremy Corbyn has been re-elected leader of the U.K.’s opposition Labour Party, storming to victory over challenger Owen Smith with an increased mandate from the party’s members that will strengthen his authority over the divided party.

Labour members voted 61.8 percent to 38.2 percent in favour of Corbyn — increasing his share of the vote from the 59.5 percent he secured last year.