We are ending our live coverage of reaction to the conclusions of the Litvinenko Inquiry here.

We leave you with a recap of the main events of the day.

• Judge Sir Robert Owen's report on the death of former Russian spy Alexander Litvinenko in London in 2006 concludes that Russian President Vladimir Putin "probably" approved his murder 
• The long-awaited report found two Russian men - Andrei Lugovoi and Dmitry Kovtun - deliberately poisoned Mr Litvinenko by putting radioactive polonium-210 into his tea at a hotel
• Mr Putin is likely to have signed off the poisoning in part due to personal "antagonism" between the pair, as well as because of his work for British intelligence agencies, criticism of Russian authorities, and association with other Russian dissidents, the report says.
• David Cameron promises the UK is "toughening" its action against Russia. He says UK will have to continue "some sort of relationship with them [Russia]" but with "clear eyes and a very cold heart"
• Russian Foreign Ministry reacts to the inquiry calling it "politicised" and saying it has "overshadowed the general atmosphere of bilateral relations"

• Mr Putin's spokesman says Moscow's official response will happen through "diplomatic channels". Mr Putin himself has not commented, 
• Home Secretary Theresa May faces criticisms from all parties in the Commons, including calls from Labour for the 2018 Fifa World Cup to be taken away from Russia
• Widow Marina Litvinenko says she is "very pleased" with the report and calls for a UK government travel ban for Mr Putin and sanctions against Russia  

• Russian suspect Andrei Lugovoi calls the allegations against him "absurd", while his fellow suspect Dmitry Kovtun says he will react once he has more information about the report findings

BBC Monitoring

Here's that quote from Dmitry Peskov, Kremlin spoksman, in full, taken from the Russian news agency, Interfax.

Kremlin spokesman Dmitry Peskov said the report on the murder of Alexander Litvinenko was the product of "the elegant sense of humour of the British".

Downing Street has responded by saying: "The murder of someone in Britain, the pain and torment this has caused for his family and an independent inquiry with such conclusions is far from that."

The Press Association has put together some of the key statistics contained in the inquiry into the death of Alexander Litvinenko: 

• 50 micrograms - the minimum amount of polonium-210 believed to have been put into the teapot from which Mr Litvinenko drank at the Millennium Hotel in London on 1 November, 2006.

• 100 grams - the approximate amount of polonium-210 made in nuclear reactors each year around the world. 
• 4.4 gigabecquerels - the radioactivity of Mr Litvinenko's likely total intake of polonium-210. Roughly 10,000 becquerels, when ingested, is enough to kill a person. 

• £2,000 per month - Mr Litvinenko's payments for supplying information to British intelligence, which began in 2004. 
• £2.2m - the total cost of the inquiry into Mr Litvinenko's death. 
• 22 days - the length of time between Mr Litvinenko's poisoning and his death, on 23 November, 2006. 
• 60locations - the number of places examined and assessed by more than 200 officers as part of the police investigation into his death.
• 15 countries - the number of nations to which requests for legal assistance were made as part of the investigation. 
• 135,000 words - the approximate length of the inquiry report, running to almost 330 pages. 
• 17 months - total length of the inquiry from the formal setting up date to the submission of the report. A total of 62 witnesses gave oral evidence. 

Mr Cameron has not ruled out further punitive action, saying he will look carefully at the report, but he says the UK has to continue to conduct relations with Russia on some level to try to resolve the conflict in Syria.

Mr Cameron says: "What we've added today is further asset freezes, writing to the prosecuting authorities to see what more can be done."

He called the murder "absolutely appalling", adding: "This report confirms what we always believed, and what we believed at the time of this dreadful murder, that it was state-sponsored action."

Prime Minister David Cameron tells the BBC: "Be in no doubt, this shocking event was reacted to years ago when it happened and we're toughening our action again today."

The BBC's Richard Galpin explains the accusation that Vladimir Putin ordered Alexander Litvinenko's killing.  

Watch his analysis here.

BBC Monitoring

A spokesman for Russian President Vladimir Putin says Moscow's response to the UK report on the Litvinenko killing will happen through "diplomatic channels". 

"All the necessary answers will of course be given through diplomatic channels," Dmitry Preskov was quoted saying by the Interfax news agency.

A white teapot was at the centre of the murder inquiry that shocked the world and plunged Britain's relations with Russia into crisis. 

Dissident spy Alexander Litvinenko died three weeks after drinking tea at the Pine Bar of the Millennium Hotel in Mayfair, central London, in November 2006. 

After his death, every teapot at the hotel was tested and only one bore evidence of contamination, the probe heard. 

Extremely high readings were detected on the porcelain pot, which was given the exhibit number NJH/1. 

The highest levels were found on the inside of the spout. One expert estimated that at least 50 micrograms of polonium 210 was placed into the teapot.

The inquiry report said forensic evidence showed the Pine Bar was heavily contaminated, with the highest readings taken from the table where Mr Litvinenko was sitting and from the inside of one of the teapots. 

"No comparable levels of contamination were found in any of the other places that Mr Litvinenko visited that day," it said. 

In his conclusions, inquiry chairman Sir Robert Owen wrote: "I am sure that Mr Lugovoi and Mr Kovtun placed the polonium 210 in the teapot at the Pine Bar on November 1 2006."

Sir Andrew Wood, who was UK ambassador to Moscow between 1995 to 2000, the year that Alexander Litvinenko left Russia for the UK, said it was "about time" blame was placed at the door of the Kremlin.

He said he was relieved that the conclusions were "so clear, so well-argued, and so demonstrable".

He said the idea that there was processed polonium available on the streets was "extraordinarily unlikely".

Much more likely was the probability that someone at a senior level must have give the poison to them.

For years Moscow rejected allegations of high-level involvement into the murder of Alexander Litvinenko.

The fact Russian President Putin himself is now associated with this assassination has not changed anything. Taking their lead from Robert Owen’s use of the words “high probability”, the second tier of the Russian establishment, mainly Kremlin-loyalist MPs, are dismissing the entire report as a politically-based fabrication.

Russians on social media are making fun of its conclusions by using the hashtag ‘PutinProbablyApproved’ in Russian to include all manner of crimes. (#ПутинВозможноОдобрил, external).

So too are Andrei Lugovoi and Dmitry Kovtun. Their story has become so well-rehearsed that no amount of detail published in London is likely to change that. 

For almost 10 years both had to stay in Russia as there are international warrants for their arrest. It is unlikely they still have any assets to be frozen by the British authorities.

One member of parliament, Nikolai Kovalev, himself an ex-FSB boss, pointed out relations between Moscow and London would not be harmed by the report as there was no room for making them any worse.

CNN is running an opinion piece - Don't let Vladimir Putin get away with murder on British soil, external - by William Browder, the CEO and co-founder of investment fund Hermitage Capital Management, which was once the largest foreign investor in Russia. 

His previous accusations of Russian corruption have seen him barred from the country and tried in absentia for tax evasion. 

He believes Alexander Litvinenko "wasn't the first critic of Vladimir Putin to end up dead, and he won't be the last".

Image source, PA

Image source, PA

Murder suspect Andrei Lugovoi is said to have given this t-shirt to an associate in Moscow and asked for it be delivered as a "gift" to billionaire Boris Berezovsky, a friend of Mr Litvinenko's, in 2010. 

The front says: "Polonium-210 CSKA London, Hamburg. To Be Continued", while the back says: "CSKA Moscow Nuclear Death Is Knocking Your Door". 

Inquiry chairman Sir Robert said: "The T-shirt could be seen as an admission by Mr Lugovoi that he had poisoned Mr Litvinenko, made at a time when he was confident that he would never be extradited from Russia, and wished to taunt Mr Berezovsky with that fact. 

"Alternatively, it could, perhaps, be seen as an extraordinarily tasteless joke." 

Mr Berezovsky died at his Berkshire home in 2013.

Con Coughlin, writing in the Daily Telegraph, asks: how can treat a brute like Vladimir Putin as our ally?, external

Former Conservative Defence Secretary Liam Fox says the West has "a policy of wishful thinking" towards Russian relations. 

The Owen inquiry report draws attention to several political poisonings in the years before Alexander Litvinenko’s murder in 2006.

In particular, he mentions “an apparent attempt to poison Viktor Yuschenko, the anti-Moscow candidate in presidential elections taking place in Ukraine” in September 2004.

The BBC Radio programme Witness has just broadcast an interview with the former Ukrainian president about how he was poisoned. You can find it here: http://www.bbc.co.uk/programmes/p03fcjh5