JEREMY CORBYN supporters are “confident” of securing a historic victory for the left in Labour’s leadership contest today — despite a low trade union turnout.

After a grueling 119-day campaign which saw Mr Corbyn address more than 55,000 people, the new party leader will be revealed in London at lunchtime.

Sources close to the left candidate said his prospects look “very, very promising” after union-backed Sadiq Khan won Labour’s London mayoral selection yesterday.