Five new members of the Labour Party who have "paid their dues" are fighting a test case High Court battle against being excluded from the right to vote in the forthcoming leadership election.
After a day-long hearing on Thursday, a judge said he would give his judgment on Monday.
A QC representing the five accused the party's national executive committee (NEC) of unlawfully "freezing" them and many others out of the high-profile contest between Jeremy Corbyn and Owen Smith.
The court action affects almost 130,000 disenfranchised Labour supporters who could play an important role in the contest if they win the right to vote.
The case was triggered by an NEC decision that full members would not be able to vote if they had not had at least six months' continuous membership up to July 12 - the "freeze date".
To gain the right to vote, members were given a window of opportunity, between July 18 and 20, to become "registered supporters" on payment of an additional fee of £25. Non-members were given the same opportunity.
Stephen Cragg QC, appear
ing for the five, asked Mr Justice Hickinbottom, sitting in London, to declare that party rules had been misapplied and the five are entitled to vote in the September 24 poll.
They are Christine Evangelou, Rev Edward Leir, Hannah Fordham, Chris Granger and "FM", a new member aged under 18 who is bringing an additional challenge through his mother on the grounds of age discrimination.
Ms Evangelou, 41, a fitness instructor from Enfield, north London, said outside court: "I am disgusted that they are trying to take my vote away, and the votes of people like me."
The single mother has been a Labour voter all her life, but only recently joined the Labour Party because she wishes to support Mr Corbyn and his "Labour values".
Ms Evangelou said the party had changed under the Tony Blair leadership - "I think Corbyn is taking it back to its roots and what the Labour Party actually is.
"I think it is fair to assume that most of the astonishing number of members who have recently joined wish to vote for Corbyn.
"If you are going to exclude over 100,000 voters, you are not going to get the full picture of what people actually want."
In court, Mr Cragg told the judge that anyone looking on the party website, or reading its rule book, would have concluded that, having joined the party, there was nothing to stop the five from voting.
Arguing they had been misled, Mr Cragg said: "They paid their dues and found to their surprise they had been excluded from the present election.
"We say they have been wrongly excluded by breach of contract from the right to vote.
"We say there is nothing in the Labour Party rule book that suggests a limit on the members who can take part in the leadership election."
The Labour Party and its general secretary, Iain McNicol, argue the rules permit the July 12 freeze date and there has been no contractual breach or misrepresentation.
Peter Oldham QC, appearing for the party, argued that the NEC had "specific power" to impose a freeze as part of its role in issuing an election timetable.
The Labour five have been crowdfunded and are seeking to raise £40,000 to cover their legal costs.
They say on their own website they are a collection of Labour members who have joined the party since January 12 and "feel let down and confused" over the decision to deny them the vote.
They state: "When we joined the party, the (Labour Party) website said, 'as a member, you'll be a key part of the team. You'll be eligible to vote in leadership elections'.
"Not only can we not vote in this election according to the current procedures, but we do not feel like a valued part of the Labour team."
Their solicitor, Kate Harrison, of London-based law firm Harrison Grant, said the High Court hearing was taking place as a matter of urgency.
She said: "The whole point of expediting the case is so that if we do win, the excluded members can be on the voting lists before they are finalised on August 8."