We have to be very careful about blaming Vladimir Putin for Sergei Skripal's poisoning - but, if it's proven, we have to throw everything at Russia.
That's the view of politics expert Anthony Glees, who spoke to talkRADIO after it was confirmed that Skripal and his daughter were poisoned with a nerve agent.
Glees told Julia Hartley-Brewee that, despite all the speculation and innuendo, we still don't know for sure that Putin or Russia were behind the attack.
He added that, if Putin wanted to kill Skripal, he could simply have executed him when the former double agent was found guilty of treason in 2010.
Russia, he continued, is not the only country to produce nerve gas - indeed the United States produces it as well.
However Glees said that, as Diane Abbott said, the British government cannot allow its country to be used as "killing fields" for a foreign power.
If Russia's involvement is proven, Glees said, we have to "give them all that we have short of weaponry", as Russia would have "moved from being our adversary to being our outright enemy."
Any British government, "even one led by Jeremy Corbyn, would have to throw it at Russia."