British Labour Party politician Angela Eagle on Saturday said she will announce her bid for the leadership of the Labour Party on Monday.
Eagle, who has resigned as shadow Business Secretary, said Labour Party leader Jeremy Corbyn had failed "to lead an organised and effective" party.
Corbyn's spokesman insisted that he would remain as leader of the party and would fight any leadership challenge, BBC reported.
Corbyn has refused to step down despite a vote of no confidence passed by the party's MPs last month, and many resignations from his shadow cabinet in the wake of the EU referendum.
Confirming her leadership bid, Eagle said she would "explain my vision for the country and the difference a strong Labour Party can make" on Monday.
But Corbyn, speaking at the Durham Miners' Gala, urged the party to unite, BBC added.
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