Rishi Sunak has said the UK “discourages” the use of cluster bombs after the US agreed to send them to Ukraine.
President Joe Biden has faced criticism for supplying the munitions, which are banned by many allies because of their track record of killing and maiming civilians.
The prime minister said the UK was one of 123 countries that signed a convention banning their use, and would continue focusing on supplying tanks and long-range weapons to help the fight against Russia.
He added: “We will continue to do our part to support Ukraine against Russia’s illegal and unprovoked invasion, but we’ve done that by providing heavy battle tanks and most recently long-range weapons, and hopefully all countries can continue to support Ukraine.
“Russia’s act of barbarism is causing untold suffering to millions of people.
The US decision to send cluster munitions to Ukraine is extremely controversial and is already causing splits in the alliance.
The problem is many of the allies – including the UK – are signatories to a convention banning their use.
And the reason for that is simple – as weapons they are absolutely horrific, hanging around long after the fighting has ceased with the potential to kill indiscriminately.
The US has got Kyiv to agree not to use the munitions in built-up areas but that’s hardly the point – and it’s why there is great unease about their supply.
Cluster munitions describe a method of dispersing large numbers of bomblets over a wide area – they can be delivered by missile, rocket or artillery shell.
They are meant to explode on impact but many don’t, meaning they remain where they fall and can be trodden on by civilians.
They are thought extremely effective as an area weapon, especially when used against heavily fortified positions.
And with Ukraine’s counteroffensive making slow progress the calculation in Washington seems to be that they could help advancing forces to break Russian lines.
Ukraine is also running low on artillery shells.
Neither Russia nor Ukraine are signatories to the treaty and both have used them since the start of the invasion.
The political dimension to all this is awkward but it’s unlikely to derail the alliance.
Downing Street has made its position clear and that will probably be the end of the matter.
There’s though, a real danger of the moral ground the West considers itself to stand on, on the issue of Ukraine, becoming eroded.
Russian war crimes are well documented but Washington is certainly opening itself up to accusations of hypocrisy and double standards.
Some human rights groups consider even the use of cluster munitions as a war crime.
The Convention on Cluster Munitions prohibits their use or stockpiling because of their indiscriminate effect on civilian populations, though the US, Ukraine, and Russia are not signatories.
Both Moscow and Kyiv have used cluster munitions so far in the war.
Ukrainian President Volodymyr Zelenskyy thanked the US for the “timely, broad and much-needed defence aid package” that will “bring Ukraine closer to victory over the enemy, and democracy to victory over dictatorship”.
Commons Defence Committee chairman Tobias Ellwood urged the US to “reconsider”.
The Tory MP tweeted: “This is the wrong call and will alienate international good will. Their use leaves deadly unexploded ordnance over the battlefield, killing & injuring civilians .”
But Dr Yuriy Sak, adviser to Ukraine’s defence minister, told Sky News: “It is an important move. It is a timely move.
“Russia has been using cluster munitions from day one of this aggressive, unprovoked war against Ukraine. They’ve been using cluster munitions against civilian cities.
“Now, we need these types of weapons as well as other types of weapons, in order for us to achieve one single sole purpose, which is to liberate our land.”
He added: “We will be using these weapons very responsibly.
“Our minister of defence has given written assurances that certain principles will be applied.
“We have a right to self-defence… but in exercising that right, we will always commit ourselves to abiding the international norms of war and humanitarian laws.
“We are dealing with an enemy who is killing our civilians every day.”
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0:40
Zelenskyy marks 500 days of conflict
‘The only target will be the enemy’
Insisting the weapons would not be used in urban areas, Dr Sak said: “They will be used only on the battlefield to allow the Ukrainian army to break through the defence lines of the enemy.
“The only target will be the enemy.”
Germany, which is signed up to the cluster bomb ban, has expressed understanding for the American position.
A spokesman for the Berlin government said: “We’re certain that our US friends didn’t take the decision about supplying such ammunition lightly.
“We need to remember once again that Russia has already used cluster ammunition at a large scale in its illegal war of aggression against Ukraine.”
But Spain, also a signatory to the convention, said it opposed the decision.
Spanish defence minister Margarita Robles said: “Spain, based on the firm commitment it has with Ukraine, also has a firm commitment that certain weapons and bombs cannot be delivered under any circumstances.”
Assisted dying could become legal in England and Wales after the bill was backed by MPs in a historic vote.
Kim Leadbeater’s Terminally Ill Adults (End of Life) Bill received 330 yes votes compared to 275 noes at its second reading in the House of Commons – a majority of 55.
The bill would allow adults who are terminally ill with just six months left to live to request medical assistance to end their lives.
Today’s result means the legislation will now progress to the committee stage for scrutiny, with the Lords also to be given opportunities to express their views on the measure before it potentially becomes law.
MPs were given a free vote – meaning they could side with their conscience and not along party lines, with the government staying neutral on the matter.
The division list showed Prime Minister Sir Keir Starmer backed the proposal, as did Chancellor Rachel Reeves.
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MPs debate assisted dying
The vote came after a five-hour debate in the chamber, which drew emotional arguments on both sides.
Conservative former minister Andrew Mitchell revealed he changed his mind on assisted dying after finding himself with “tears pouring down my face” on hearing the stories of constituents whose loved ones had died “in great pain and great indignity”.
On the other side of the argument, veteran Labour MP Diane Abbott said assisted dying could result in sick people “feeling like a burden” on society, adding: ” I can imagine myself saying that in particular circumstances.”
She warned: “If this bill passes, we will have the NHS as a fully-funded 100% suicide service but palliative care will only be funded at 30% at best.”
Bill about ‘choice and dignity’
Opening the debate on the topic, Labour backbencher Ms Leadbeater said the bill was about giving dying people “choice, autonomy, and dignity” – saying the current law was “failing” them.
She has insisted her bill contains “the most robust safeguards” of any assisted dying legislation in the word.
This includes two independent doctors having to approve the decision, followed by a high-court judge, with the person having to administer the drugs themselves.
The legislation also includes a maximum 14-year prison sentence for anyone who coerces someone into requesting assisted dying or taking the medicine.
Speaking to Sky News’ political editor Beth Rigby after the vote, an emotional Ms Leadbeater said she was “incredibly proud” of the result and parliament must now “take on board everything that’s been discussed in the chamber”, including the state of palliative care and the rights of disabled people.
This breaking news story is being updated and more details will be published shortly.
Heidi Alexander has been appointed the new transport secretary after Louise Haigh stepped down.
The Swindon South MP had been serving as a justice minister until her promotion today, and worked as Sadiq Khan’s deputy transport mayor between 2018-2021.
Ms Haigh resigned after Sky News revealed she pleaded guilty to an offence related to incorrectly telling police that a work mobile phone was stolen in 2013.
In a letter to the prime minister, she described the incident as a “mistake” but said that “whatever the facts of the matter, this issue will inevitably be a distraction from delivering on the work of this government”.
She called the incident a “genuine mistake from which I did not make any gain”.
The Tories have said it raises questions about what exactly Sir Keir knew when he appointed her to his shadow cabinet in opposition.
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Responding to her resignation letter, the prime minister thanked Ms Haigh for “all you have done to deliver this government’s ambitious transport agenda” and said: “I know you still have a huge contribution to make in the future.”
This breaking news story is being updated and more details will be published shortly.
A 16-year-old girl has been charged with the murder of a man in King’s Cross.
The teenager, from Brixton, south London, will appear at magistrates’ court later today charged with the murder of Anthony Marks, 51, in August this year.
Mr Marks was assaulted on Cromer Street on Saturday 10 August.
A 17-year-old boy has previously been charged and remanded in custody to face trial next year.
Police are keen to hear from any witnesses who may not have come forward yet, as well as Mr Marks’s next of kin, who still remain unidentified.