The Skripal probe just got even more complex as Sofia investigates a possible link between the nerve agent attack on a former Russian spy in England in 2018 and the poisoning of an arms dealer on its soil in 2015.
Euronews' Vincent McAviney reflects on the top stories of 2018 and has some predictions for 2019.
In March, sleepy Salisbury, a small city an hour from London, became the centre of international intrigue when a former Russian spy and his daughter were found catatonic on a bench.
Alexander Mishkin, the second man accused of poisoning Sergei and Yulia Skripal in Salisbury, was decorated as a hero by Putin in 2014, said investigative group Bellingcat.
"We will expose the Russian intelligence service" - the message from British foreign secretary Jeremy Hunt as Britain takes aim at Russia. The UK foreign office is blaming Russian intelligence services for six cyber-attacks in an aggressive statement that directly implicates Vladimir Putin.
One of the suspects in the poisoning of Sergei and Yulia Skripal in Salisbury has been named as a highly-decorated officer in Russia’s military special forces by investigative website Bellingcat. The man previously named as Ruslan Boshirov is said to be in fact Colonel Anatoliy Chepiga.
We assess four key claims made by the Russian men charged with poisoning Sergei and Yulia Skripal about their time in southern England.
UK government says interview contains 'blatant fabrications' and is 'offensive'.
The UK government has claimed two GRU officers carried out the Salisbury Novichok attack — different from the KGB, what do we know about Russia's most secretive intelligence agency?
The OPCW’s findings came as the Russian Embassy in London accused the UK of refusing it access to the Skripals.
Washington's announcement of new sanctions against Russia over the Skripal poisoning has been welcomed in London, and condemned in Moscow.
The British man poisoned with the nerve agent claims the substance which killed Dawn Sturgess and left him ill was found in a sealed perfume box.
Russian ambassador to UK shrugs off reports that suspects in Skripal case were identified, says he wants confirmation from Foreign Office or Scotland Yard.
“The substance is very stable. It can be washed away by rain, it can evaporate under the sun. But it won’t decompose,” said Vladimir Uglev.
British police say Dawn Sturgess has died after exposure to novichok nerve agent in Wiltshire, England.
Russian politicians respond to the poisoning of a couple by accidental exposure to Novichok, an extremely powerful nerve agent, in Amesbury, England.
UK Interior Minister gives a statement on new Novichok poisoning case.
President Vladimir Putin will hope to keep world's attention on football
Staff at Salisbury District hospital have been talking about how they faced the unknown when a former Russian double agent and his daughter were attacked with a lethal nerve agent.
Moscow questions whether Skripal was speaking of her own free will
The Cube looks at reactions to the first public statement from Yulia Skripal
Yulia Skripal, daughter of poisoned Russian spy Sergei Skripal, speaks to Reuters in London.
Russia's ambassador to the UN cited Lewis Carroll at the UN Security Council and says Russia's western partners are not interested in the truth.
Representatives from both countries traded accusations on the March 4th chemical attack in Salisbury
The UK's national security adviser claims that Russia spied on the Skripals for five years before they were poisoned in Salisbury. Russia calls the allegations a "big surprise".
Two guinea pigs were found dead at the home of Sergei Skripal and a cat had to be put down, British government officials revealed, following the nerve agent attack on the former spy and his daughter, Yulia.