If Labour unity has largely held since the election it is because Miliband has chosen to postpone almost all policy decisions.
The party should remember that benefits for the poor end up being poor benefits.
The party says it is right to challenge "old ways of doing things" after Blair warns against a shift to the left.
Rafael Behr spent the day on the campaign trail with the Labour leader - a day that took a dramatic turn with news that Thatcher is dead.
The centre has not shifted to the left, says Tony Blair. Labour must resist the easy option of tying itself to those forces whose anti-Tory shouts are loudest.
The former prime minister says Labour must be more than "fellow travellers in sympathy" and warns it not to "tack left on tax and spending".
"Not for her the contempt sometimes heaped on ideas and new thinking in political life."
Everyone waited for the Labour leader to say something on welfare. He did but (for obvious reasons) no one noticed.
"She moved the centre ground of British politics," the Labour leader said. He is trying to achieve the same feat today.
Miliband will announce that the party would give councils new powers to limit the spread of payday lenders and betting shops on the high street.