Asked about Corbyn's refusal to consider using nuclear weapons, Gwynne said: "No prime minister has ever been put in the position where they have had to consider using them".

Corbyn is now campaigning around the country head of the general election on June 8. I have made clear there would be no first use of it.

'Because on an issue of this importance the Government can't hide from the public or parliament.

Writing in the Guardian, he warned Mr Corbyn "this is not the time to fight a conventional partisan election". I am no supporter or defender in any way whatsoever of ISIS.

"Yet our Labour, Lib Dem and Nationalist opponents - Plaid Cymru here in Wales and Nicola Sturgeon's SNP in Scotland - are already seeking to disrupt our negotiations, even as 27 other European countries line up to oppose us".

But in a statement issued less than two hours after his appearance on BBC1's The Andrew Marr Show, a party spokesman said: "The decision to renew Trident has been taken and Labour supports that".

A "presumption of devolution" would also be introduced ensuring that powers transferred from the European Union - such as fishing and agriculture - will go straight to the relevant region or nation, Starmer will say.

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Starmer said that a Labour government would rewrite May's Brexit negotiating strategy and would focus instead on a deal that retained as numerous benefits as possible of the single market and customs union.

Mr Corbyn has insisted there will be "no deals with the SNP or anybody else" as he sought to stamp out Tory warnings of a possible coalition pact. Giving working people the rights to collectively organise and make their lives better, safer and more content.

"The Tories have taken an extreme position, demanding an end to any opposition at Westminster if they win the election".

Corbyn then went on to have a sly dig at the current Prime Minister by saying "But where Theresa May divides, Labour will unite our four nations". "We've had people who have nothing against Labour just asking us to campaign to get her out".

"Independence is not an escape route from the Tories, it's a fast track to turbo-charged austerity".

Pressed on whether this could mean abandoning Britain's ability to cut non-EU trade deals, Sir Keir said: "We have to get the right deal with the EU. He's against the nuclear deterrent; would stop building the submarines which we have already started building; he wouldn't control our borders; and earlier he has even questioned our North Atlantic Treaty Organisation deployment".