Russian defector Boris Karpichkov has received chilling death threats from his former FSB spymasters.
One arrived at a London address he uses and another at a rural hideout known only to a few friends, where he has a new name.
Both warn he will die like Salisbury Novichok poisoning victim Dawn Sturgess if he does not keep his mouth shut.
The addresses the threats come from are local cemeteries and they are signed Vadim Petrovich Kravchenko , one of Karpichkov’s cover names as an FSB double agent.
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One says: “Today you feel quite healthy but tomorrow you get sick and die.”
He is also told: “It is time for you to start seriously thinking about death and its imminent arrival.
“The taste of death should stay permanently in your mouth and its name should bounce on your teeth.”
Mr Karpichkov, 60, who fled to Britain with his wife and two children 20 years ago, has also been threatened with being run over by a lorry and thrown under a Tube train.
But he says Britain has never bankrolled him and will not protect him, despite giving MI5 two suitcases full of secrets.
He said: “I’m so desperate, I’m going crazy.
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“The Russian security services know my current identity and the two places where I live. My family and I need urgent relocation.”
He was recruited at 24 by the FSB’s forerunner, the KGB, and became a Major, mounting intelligence operations abroad.
He claims to have spied on Latvia for the Russians and on Russia for the Latvians, the American CIA and the French.
By 1998 Russia had rumbled him and he was thrown in jail, fleeing to Britain on false papers when given temporary release.
