MP for Dearne and Wentworth, John Healey, has announced he is running to become Deputy Leader of the Labour Party.
Mr Healey said he had not intended to run but said he was "dismayed at how narrow and shallow the debate has been so far".
He becomes the seventh candidate in the running for the position, meaning at least one or two of those already declared will lack enough MPs' support to make the ballot paper.
Also standing are Don Valley MP, Caroline Flint, as well as Rushanara Ali, Ben Bradshaw, Angela Eagle, Stella Creasy, and Tom Watson.
Outspoken Labour MP John Mann claims he could have been the Labour Party's next leader, but does not have enough support inside the party.
In the past two days the Bassetlaw MP has derided his party for its "monochrome" performance in the general election and released his own "manifesto for a brilliant Britain".
He told ITV Calendar it contains values many traditional Labour supporters would support, but he does not have enough support from party colleagues to challenge as leader:
Asked if he thought he could do the top job in the party, Mr Mann said, "Of course I could do the top job."
"Get me a group of Labour MPs signing a nomination and perhaps I'll be there. But I'm not holding my breath."
The MP for Bassetlaw, John Mann, has released his manifesto which he says tackles a 'fragmented' and 'monochrome' Britain.Read the full story ›
In a damning critique of his party, Bassetlaw's MP says Labour lost the election because of 'monochrome' policies.Read the full story ›
Labour have held on to control of Rotherham Borough Council, despite UKIP gaining three seats.
They now hold a majority of 19, losing one seat, while the Conservatives and an independent also lost one seat each.
Ed Miliband has resigned as leader of the Labour Party saying he takes "absolute and total responsibility" for the party's defeat.
Mr Miliband held on to his Doncaster North seat, but quit after a dramatic election night where his party was virtually wiped out in Scotland and David Cameron was on the way to a Commons majority.
This is not the speech I wanted to give today.
Earlier today I rang David Cameron and congratulated him. I take absolute and total responsibility for the result and out defeat at this election.
Britain needs a strong Labour party and now it's time for someone else to take forward the leadership.
So I am tendering my resignation.
He told them he was looking forward to spending more time with his family and he thanked the British people for their involvement in his campaign.
"Thank you for the selfies, thank you for the support," he said.
"And thank you for the most unlikely cult of the 21st century - Milifandom."
Former Shadow Chancellor, Ed Balls, refused to answer questions or speak to the media after losing his Morley and Outwood seat.
Balls lost out to Tory candidate, Andrea Jenkyns, by a small majority in a disappointing night for the Labour Party:
Labour is holding on to York Central with Rachael Maskell as the new MP, replacing Sir Hugh Bayley.
Richard Burgon has won Leeds East for Labour with more than 20,000 votes. He takes over from Labour's George Mudie who stood down.