The Labour Party have confirmed that Owen Smith will be the sole challenger to Jeremy Corbyn for leader of the party, after Angela Eagle backed out of the contest.
A Labour spokesperson said: "The nominations for candidates in the 2016 Labour Leadership contest by members of the PLP and EPLP closed at 5pm today. The nominations have been officially accepted and received.
"Jeremy Corbyn and Owen Smith are the Labour Leadership candidates."
The leader of Britain's biggest trade union has condemned a decision by Tom Watson to call off a meeting over the leadership crisis as an "act of sabotage."
Len McCluskey, general secretary of Unite, said that a plan to resolve bitter differences in the party had "never been closer", but Mr Watson cancelled the meeting which was due to take place on Sunday.
In a statement Mr McCluskey said: "I am dismayed at the statement issued by Tom Watson announcing his withdrawal from talks aimed at resolving the crisis in the Labour Party.
"When the possibility of a workable plan had never seemed closer, Tom Watson's actions today can only look like an act of sabotage fraught with peril for the future of the Labour Party."