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And on that subject, George Osborne - pictured here in Manchester on the eve of the conference - says he will "see how it flies" when David Cameron stands down as Tory leader.

He's spoken to the Mail on Sunday.

John Pienaar
Pienaar’s Politics

The guests on Pienaar's Politics today include Minister for Trade and Investment Lord Maude and Employment Minister Priti Patel. 

You can listen live here.

The Andrew Marr Show

Image source, Getty Images

David Cameron refuses to "dignify" the allegations in Lord Ashcroft's book with a response.

The book was written as an act of "revenge, as he says," says the PM on Lord Ashcroft's motives.

Asked about Ashcroft's claims he was promised a seat in the cabinet in return for large donations to the Tory party, he says the party needed money to clear its £28m debts. 

But he adds: "No one should end up in government because they are a donor. That would be wrong". 

And the fact Ashcroft did not get a job proves that the party did nothing wrong, he argues.

The Andrew Marr Show

Image source, PA

"If you believe in the nuclear deterrent, as I do, you have to accept there are circumstances that justify its use," says David Cameron.

The Andrew Marr Show

The PM is quizzed about the Ministry of Justice bidding for a contract to build a prison in Saudi Arabia - an issue raised by Jeremy Corbyn in his Labour leader speech in Brighton.

He says the UK does not support the death penalty in Saudi Arabia, but dodges the issue of the prison contract.

The Andrew Marr Show

David Cameron urges Putin to "change direction" and back UK and US efforts to attack so-called Islamic state. rather than "backing the butcher Assad." which will lead to "more instability" and increasing tension.

The Andrew Marr Show

"There is nothing I am going to bring back that will satisfy these people," says David Cameron, of demands by Eurosceptic Tories such as Owen Paterson.

Will he allow Tory MPs to campaign for an out vote?

The time to take that decision is when the negotiations have been completed, but cabinet ministers will be expected to back him, says Mr Cameron. That's "collective responsibility".

The Andrew Marr Show

Image source, AP

David Cameron rejects Len McCluskey's offer to accept higher strike ballot thresholds in return for allowing online ballots.

The PM says online voting is too open to "fraud".

The Andrew Marr Show

David Cameron rejects calls to mitigate cuts to tax credits due to come in at the end of the year. It's part of a plan to let people keep more of the money they earn, when the National Living Wage comes in, he says.

It's going to be a "miserable Chrismas" for those families that get a letter saying their tax credits have been cut, suggests Andrew Marr.

Parliament has voted on it and people will be better off when the National Living Wage increases kick in, says Mr Cameron.

The Andrew Marr Show

The government is publishing a new GPs contract, says David Cameron, to pave the way for a seven day NHS, with services on offer from 8am to 8pm

The Andrew Marr Show

David Cameron insists the Tory conference will not be an orgy of "back slapping" over their unexpected general election victory. There may be some mild celebrations, he concedes.

The Andrew Marr Show

David Cameron says his party will not be distracted by Labour's apparent move to the left under Jeremy Corbyn

The Andrew Marr Show

Len McCluskey neatly sidesteps the issue that dominated the end of the Labour conference - Jeremy Corbyn's refusal to push the nuclear button if he becomes PM.

Mr McCluskey, who like other big union leaders does not want to scrap Trident because it will cost jobs, says it is all "hypothetical stuff" because it the UK could not fire its weapons without US approval.

He urges Labour MPs not to "fall into the trap" of arguing about Mr Corbyn's stance on renewing Trident because it's all going to be decided in Parliament next year.

The Andrew Marr Show

Len McCluskey once again reserves the right for his members to break the law in protests, as Andrew Marr predicts a "shouty" TUC march later in Manchester.

The Andrew Marr Show

Len McCluskey has never met David Cameron, he reveals. Now's his chance.

The Andrew Marr Show

Unite leader Len McCluskey says he has written to David Cameron asking him to consider alllowing online ballots for strike action. He also says new trade union laws will only hit English workers. Perhaps Andrew can put this to the PM later, says Mr McCluskey.

The Andrew Marr Show

Alex Salmond booked a BA flight under the name James T Kirk, according to the Mail on Sunday., external

It causes some amusement on the paper review sofa.