Court rejects challenge to Jeremy Corbyn automatically being on Labour ballot
Boris Johnson meets French counterpart in Paris
Theresa May holds Brexit talks in Slovakia and Poland
Hinkley Point nuclear plant set to get final investment approval
House of Lords
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That's it from the Lords for tonight - they meet again tomorrow at 14.30 BST for questions on:
Trident debate
House of Commons
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Earlier in the Trident debate Green MP Caroline Lucas argued "it cannot be proven" that nuclear weapons make us safer - as it is "impossible to prove a negative".
Many military experts argue that nuclear weapons "make us less safe" because it increases the amount of nuclear material "floating around the world".
By "exacerbating the uncertainty" around the future of the world, Trident is "leading to the situation it was designed to avoid", she argues.
If the nuclear deterrent is so vital for preventing nuclear attacks, why won’t the West allow all countries in the world to have nuclear weapons, she asks.
The former Chancellor has laid out his political philosophy and made a plea for maintaining fiscal discipline.
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Britain is a signatory to a range of agreements and treaties on nuclear weapons, the most important of which is the Treaty on the Non-Proliferation on Nuclear Weapons, external (NPT).
Article 4 of NPT sets out obligations to work towards reducing the number of nuclear weapons.
The treaty also allows the five recognised nuclear states (Britain, France, USA, China and Russia) to hold nuclear weapons but commits them to arms control and eventual disarmament.
The government believes that replacing Trident is consistent with the treaty as it contains no restrictions on the updating and replacement of weapons system and provides no timescale for disarmament.
Since the end of the Cold War, the UK has taken several steps to reduce its nuclear weapons. Only the Royal Navy now has the capability to fire weapons, the Army and RAF no longer do so. Britain is also has the smallest stockpile of the five nuclear nations, which will have reduced in size by 65% by the mid-2020s.
Image source, PA
Image source, PA
Image source, PA
Image source, PAThey may have left office but they are certainly not hiding away.
David Cameron was in the Commons earlier - sitting on the backbenches for the first time in more than 10 years - for the Trident debate while Michael Gove asked a question during an earlier Commons statement on the Nice attacks.
And George Osborne has been talking about the challenges facing his party and the country at a think tank in London.
Delivering the Margaret Thatcher lecture to the Centre for Policy Studies, Mr Osborne said Trident renewal would be the single most expensive item of public expenditure over the next 15 years but was "affordable" because of the strong economic position the UK was in and necessary to uphold the UK's status as a "major global power".
Mr Osborne, who was removed as chancellor by Theresa May last week, said the new prime minister and his successor Philip Hammond would have his full support as they grappled with the challenges created by the UK's decision to leave the EU.
Quote MessageTonight, and in the future, Theresa May and the new team she has assembled will have my support. She has the strength and the integrity to do the job, as she faces up to the great challenge that lies ahead.
Although he argued strongly in favour of the UK remaining in the EU, Mr Osborne said he believed the UK could look forward "with confidence" to its future due to the resilience of its economy, the strength of its society and its commitment to internationalism.
Quote MessageWe have been – and we should always remain, in my view – a global power: interested in shaping the world rather than being shaped by it. As we negotiate our exit from the EU, I hope we seek the closest possible new ties with our European neighbours. They are, on the economy and on security, our friends not our foes. I hope we reach out to build stronger economic and trading ties now with our old allies like the United States, and our new partners like China.
Reflecting on the lessons that could be learnt from Britain's first female prime minister, Mr Osborne said Mrs Thatcher had come to power when Britain was being "written off" economically and politically and her greatest virtue in confronting this was her optimism.
Quote MessageI was a child and then a teenager at the time. I remember the hankering to return to some bygone age. I remember the Conservatives who said it was all much better in 1951, or 1851 – anything other than 1981. But not Mrs T. She was interested only in the future. And she was an optimist. She believed Britain’s best days lay ahead. I am an optimist – and so do I.
Trident debate
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Labour MP Roger Godsiff tells MPs that he was formerly a multilateralist who had "never been a member of groups like [the Campaign for Nuclear Disarmament]" but that he has changed his mind.
"The world has changed and that's why I've changed my view," he tells MPs - going in the opposite direction of prospective Labour leader Owen Smith., external
The programme is expensive and does not provide the kind of independent power that some are suggesting, Mr Godsiff argues.
The UK would also be unlikely to lose its place on the UN Security Council, he argues, as when the council was formed "only one of the five had nuclear weapons".
Trident debate
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Former shadow defence secretary Vernon Coaker says he wants to "dispel the myth" that Trident is meant to deter "terrorist outrages" or so-called Islamic State.
"Nobody in this house would argue that under any circumstance [Trident] will deter the sort of attacks we see on the London underground", he tells MPs.
The nuclear deterrent is meant to deal with "interstate actors we see in China and Russia" instead.
He criticises the SNP for wanting to get rid of nuclear weapons while arguing for an independent Scotland to be a member of Nato.
Nato members have to agree to the use of nuclear weapons in certain circumstances, he tells MPs.
Trident debate
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Conservative MP and Territorial Army Officer, Tom Tugendhat tells MPs that Trident's "second-strike capability" means a country cannot attack the UK without knowing it will also be attacked.
"That is the ultimate guarantee of sovereignty and ultimate guarantee of security", he tells MPs.
Mr Tugenhadt praises Theresa May , externalfor saying she would be willing to use the nuclear bomb, giving the “clarity” that a deterrent requires.
There are currently protests taking place against the UK's nuclear weapons both inside and outside Parliament.
The BBC's Ron Brown says a group of 10 women are currently in the Central Lobby of the Houses of Parliament singing "ban the bomb" to various tunes, including When the Saints Go Marching In and Sweet Chariot.
The demonstrators say they are from a group called Trident Ploughshares and have "blagged" their way in. No-one, it appears, is preventing them from continuing with their musical protest.
Meanwhile, opponents of Trident - including Green Party deputy leader Amelia Womack and shadow health secretary Diane Abbott - are addressing a CND rally in Parliament Square.
Ms Abbott, a close ally of Jeremy Corbyn, tells the crowd that Trident is "boys demonstrating how boyish they are".
Trident debate
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SNP defence spokesman Brendan O'Hara argues that the "world has changed almost beyond recognition" since the implementation of Trident.
Today's debate should "force us to re-examine everything we once took for granted", he says.
Mr O'Hara, whose constituency contains Faslane, the main Royal Navy base for the UK's four nuclear-armed submarines, argues that ending Trident would not necessarily lead to its closure.
HMNB Clyde has a "bright non-nuclear future as a conventional naval base in an independent Scotland" he tells MPs.
Image source, PAFormer shadow cabinet member and leadership candidate Owen Smith is now addressing a group of Labour parliamentarians in the House of Commons.
Asked on the way in by the BBC's Tom Bateman about reports that he had had discussions with Angela Eagle about a single "unity candidate" emerging to challenge Jeremy Corbyn, he said only that the media would find out in good time.
Trident debate
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Image source, PASince 1969, according to government documents, external, a British submarine carrying nuclear weapons has always been on patrol, gliding silently beneath the waves, somewhere in the world's oceans.
The logic is to deter a nuclear attack on the UK because, even if the nation's conventional defence capabilities were destroyed, the silent submarine would still be able to launch a catastrophic retaliatory strike on the aggressor, a concept known as mutually assured destruction.
The submarines, based at Faslane on the River Clyde, carry up to eight Trident missiles; each can be fitted with a number of warheads.
Read more about the history of the UK's nuclear weapons system
Trident debate
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John Woodcock says he is proud to be "speaking for the Labour party in this debate" unlike his own front bench.
Mr Woodcock, who chairs the Labour party's backbench defence committee, says he speaks for the party of "Attlee, Bevan, and Stafford Cripps" who "understood with heavy hearts" that maintaining nuclear weapons "prevents others from unleashing it again".
It is "not an act of global leadership" to call for unilateral disarmament but a "destabilising and futile abdication of responsibility".
The Labour leadership did not engage with his review - which found that Trident was the "most cost effective and secure deterrent available” - in person "but were happy to debate on Twitter", he tells MPs.
The Labour members and trade unionists who engaged in his committee's review are "being ignored by the party leader who clings to an idea of party democracy to save his own skin", adding "and it is not right".
Here's a late afternoon round-up of the day's big political stories:
Theresa May and Jeremy Corbyn have outlined their arguments for and against Trident.
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The Trident renewal will cost £179bn throughout the course of its life, chair of the Foreign Affairs Committee Crispin Blunt tells MPs.
During an intervention, Mr Blunt says this figure is based on the government's announcements of "capital costs of £31bn with £10bn contingency" and that the programme will cost "6% of the defence budget".
This does not take into account currency fluctuations, he adds, so this figure could be higher with a weak pound.
Mr Blunt tells MPs that he will not be supporting the motion, and will not vote with the government tonight.
Trident debate
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The SNP's Westminster leader, Angus Robertson, says it is "remarkable" that two hours into the debate, "we still have no idea whatsoever of what the through-life costs of Trident replacement are".
How can the government "ask us to vote on something but cannot tell us how much it will cost?" he asks.
There is "no circumstances" where the SNP would endorse "spending money on nuclear weapons". He calls Trident an "immoral, obscene and redundant weapons system".
He points out that many Conservative MPs "pride themselves on fiscal rectitude" but "not one of them have insisted the frontbench set out how much this will cost".
Trident debate
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Chair of the Defence Committee Dr Julian Lewis starts his speech by arguing that Jeremy Corbyn's election as Labour leader just proves the "unpredictability of political developments".
Just because the UK would "baulk at the idea of launching nuclear weapons" that does not mean "dictators share our scruples, or our values, or our self restraint".
He argues that the only reason chemical weapons were not deployed across whole cities during World War II, is because "Winston Churchill told Hitler that British stocks of chemical weapons greatly exceed his own" and "any retaliation would dwarf Nazi attacks".
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Labour MP Jamie Reed raises a point of order to the Speaker, saying the motion to be voted on later concerns replacing submarines, not nuclear missiles.
The Speaker says it is up to each MP "to interpret [the motion] as he or she thinks fit".
Labour leader Jeremy Corbyn, who supports unilateral nuclear disarmament, says the issue is also about "the new weapons that will have to go into those submarines".
And he urges MPs who believe in multilateral disarmament to vote against the motion, arguing that doing so would constitute progress along "the nuclear-free road".