Alexander Valterovich Litvinenko was an officer of the Russian Federal Security Service and its Soviet predecessor, the Committee for State Security, until he left the service and fled the country in
Grave of Alexander Litvinenko at Highgate Cemetery
Boris Abramovich Berezovsky, also known as Platon Elenin, was a Russian business oligarch, government official, engineer and mathematician. He was a member of the Russian Academy of Sciences and held
Poisoning of Alexander Litvinenko
…the country in late 2000, defecting to the UK. In 1998, Litvinenko and several other Russian intelligence officers said they had been ordered to kill Boris Berezovsky, a Russian businessman. After that, the Russian government began to persecute Litvinenko. He fled to the UK, where he criticised the Russian President…
Berezovsky's grave in Brookwood Cemetery in 2016