Mr Blair will deliver a speech this morning to mark the creation of the Labour Party and he will use it to criticise the current state of the political vehicle which he led to three election victories.
He will admit his advice is not ‘particularly welcome’ in the current version of the party.
But he will warn the three leadership candidates battling to replace
He will also attack Mr Corbyn for advocating policies which are ‘hopelessly out of date’ and not suitable for addressing the problems of the 21st Century.
His comments come just days before voting in the final stage of the Labour leadership race is due to begin with Sir Keir Starmer, Rebecca Long-Bailey and Lisa Nandy braced for a showdown in a ballot of party members.
Tony Blair will today deliver a stark warning to the three candidates left in the Labour leadership race
Lisa Nandy today refused to name Mr Blair as one of the party’s greatest ever leaders despite his three election wins
Mr Blair will today call for Labour to undergo a ‘head-to-toe renewal’ and embrace a ‘radical’ new mandate to help it win power within the next decade.
The 66-year-old, who won three elections for the party between 1997 and 2005, is expected to tell a central London audience: ‘I thought hard about taking stock on the Labour Party’s 120th anniversary – it’s not as if my advice is particularly welcome to today’s party.
‘But then it occurred to me that there are only two people born in the last 120 years who have actually won an election for Labour. And alas Harold Wilson is long gone.
‘Out of 120 years, Labour has been in power for just over 30 of them. That is a stark statistic.
‘We now have another Tory Government for five years, and possibly for 10.
‘Were that to happen, Labour would have been in office less than a quarter of its existence.’
Voting in the Labour leadership contest will begin on Monday and will close on April 2 with a winner announced on April 4.
The contest was triggered after Jeremy Corbyn led the party in December to its worst set of general election results since the 1930s and immediately set out his intention to quit.
Mr Blair will warn that whoever takes over from Mr Corbyn must ditch the party’s current policy agenda.
‘The problem is that we have defined radical politics by a policy agenda which is hopelessly out of date, with “moderate” politics being just a milder version of it,’ he is expected to say.
‘We must redefine what radical means. We’re living through a technology revolution which is the 21st century equivalent of the 19th century Industrial Revolution.
‘It will change everything and therefore everything should change including radical reorientation of government.
‘This is the context in which we tackle inequality, promote social justice and redistribute power.’
All three leadership challengers have been reluctant to praise Mr Blair’s leadership of the party despite his electoral success.
Rebecca Long-Bailey and Sir Keir Starmer will face off against Ms Nandy in the final round of the leadership contest
Today Ms Nandy refused to name him as one of the party’s greatest ever leaders.
Asked the question on ITV’s Good Morning Britain programme, she said: ‘I think in all honesty there have been a lot. So Attlee is the one that we always talk about.
‘Barbara Castle was the great leader that never was and if she had been a man I am sure she would have become leader of the Labour party.’
When it was pointed out to Ms Nandy that she had made no mention of Mr Blair she said that she had become an MP ‘partly out of frustration’ with New Labour.
She said she was ‘full of admiration’ for some of the last Labour government’s achievements but added: ‘The assessment of Tony Blair’s time in office is that it was game changing, it was important, but to earn the right to a hearing about the things we got right we have also got to be honest about the things we got wrong.’