"I accept now what if you'd asked me a year ago I'd have said is impossible: I accept is possible - you have to say in today's world now, there's been so many political upsets it's possible Jeremy Corbyn could become prime minister and Labour could win on that programme", Blair told Newsnight.
The former Prime Minister - who won three elections - has frequently spoken out against Corbyn, and even told party members to "get a transplant" if their heart was telling them to back the Islington North MP in the first leadership election.
I am not an expert in the fine detail of customs arrangements and regulatory equivalence (and would rather chew my own arm off than become one.) But I believe very strongly that there is a right way and a wrong way of handling the Brexit negotiations. "However, this option is excluded", regretted the former Prime minister in an article for his think-tank Institute for Global Change. The open-ended transition that they propose would be a mistake as it would lead people to wonder if we were ever actually going to leave the EU.
Without "significant progress" on all three priorities in the divorce, Barnier warns, European Union leaders will not let Davis open talks on a free trade relationship, which May and much of British business want to have ready by the time Britain leaves.
"They knew why they made that decision and they made it after a lot of information".
MORE THAN half of people said Brexit must mean Brexit, a poll comissioned by Tony Blair has said.
He said yesterday that "public opinion is moving on it" and urged voters to think again about Brexit. "The European leaders, certainly from my discussions, are willing to consider changes to accommodate Britain, including around freedom of movement".
He said the British people should be made aware of the possibility of Europe meeting the United Kingdom "half way" on a range of issues, predicting that Europe "will comprise an inner and outer circle" in the coming years. As to how Brexit negotiations should progress, the poll finds the largest group supports a hard Brexit, and just one-fifth support a second referendum.
"They will make reforms that I think will make it much more comfortable for Britain to fit itself in that outer circle", he said.
"This is a completely changed situation in Europe".
Tony Blair has defended his stance on Brexit in a fresh interview saying "it is absolutely necessary that it doesn't happen".