Mr Skripal has lived in the UK since 2010 (Picture: PA).
Russian President Vladimir Putin has called Sergei Skripal, the ex-spy who was poisoned with a military grade nerve agent in Salisbury, a traitor and a "scumbag".
It was the first time Mr Putin has directly condemned Mr Skripal, who spent weeks in hospital with his daughter Yulia after both were poisoned in the city in March.
Britain put the blame squarely on Russia but Moscow has denied any role in the incident.
Around 100 UK military personnel are currently helping with the general decontamination of the city, following the poisoning of former Russian double spy Mr Skripal and his daughter Yulia. Both have since recovered.
Extra British personnel were deployed to begin decontamination work on Sergei Skripal's home in Salisbury last month.
Asked about sanctions on Russia triggered by the attack, Mr Putin called the ex-spy "just a scumbag" who betrayed his country.
He reiterated Russia's claim that it has nothing to do with the poisoning.
Mr Putin said the former agent was of no interest to the Kremlin since he was tried in Russia and exchanged in a spy swap in 2010.