The race now moves onto supporting nominations from constituency Labour parties: who will emerge the strongest?
"I now apologise sincerely on behalf of my party for the disastrous decision to go to war in Iraq in March 2003," says the opposition leader after damning Chilcot report.
Responding to the Chilcot report, the former Labour Prime Minister maintained it was still better to remove Saddam Hussein.
The Labour leader says "those who took the decisions" must "face up to the consequences of their action".
"I ask people to put themselves in my shoes as Prime Minister..."
The devolved administration has for too long blamed Wales' woes on Westminster-imposed austerity.
The Labour leader avoided mentioning Tony Blair but said there must be "consequences" for those who misled parliament.
The Iraq inquiry turned out to be more damning than expected.
The Labour leader is focusing on the Brexit-voting areas of Britain.
Children are traumatised by the mess left by the invasion of Iraq.
A first look at this week's magazine.
We notice you have ad blocking software enabled. Support the New Statesman’s quality, independent journalism by contributing now — and this message will disappear for the next 30 days.
If we cannot support the site on advertising revenue, we will have to introduce a pay wall — meaning fewer readers will have access to our incisive analysis, comprehensive culture coverage and groundbreaking long reads.