Russia 'has spy in UK's intelligence, cyber and security agency GCHQ', says ex-KGB defector
Defector and former KGB major Boris Karpichkov claims to have new evidence that the maths genius was murdered to protect Russia's mole
A Russian spy who infiltrated Britain's top secret Government Communications Headquarters (GCHQ) base is passing secrets to Moscow, a former major in the KGB says.
Defector Boris Karpichkov claims to have new evidence back…
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