Labour leader Ed Miliband has insisted there will be no second inquiry into the Unite affair in Falkirk.
The leader of the Opposition said it was time to "move on" from allegations that one of the UK's largest trade unions tried to rig the selection process for a prospective MP.
Senior party members have called for the investigation to reopen after doubt was cast over evidence of Unite signing up party members without their consent.
Mr Miliband said: "I think what we have done is to take swift and thorough action into all of the issues around that area.
"We have taken swift and thorough action regarding this issues. The local party has put in special measures.
"The person around whom there was controversy is no longer going to be the candidate.
"The people that were signed up under the scheme that was questioned are not going to be able to vote in this election and the scheme itself has been closed down."
He added: "We have had one police inquiry already and we sorted a second set of issues, so I think we've taken swift and thorough action.
"I think the important thing for the constituency and for the people of Falkirk is to move on and select a new candidate for the Labour Party.
"The people of Falkirk need to see a new Labour candidate, and they will at the beginning of December."
Senior members of the party have supported a second inquiry.
Henry McLeish, the ex-first minister to Scotland, joined Alistair Darling, Jack Straw and Scottish Labour leader Johann Lamont yesterday in calling for investigations to continue.
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