The Soviet spy agency, the KGB, was suspected of the murder of Georgi Markov in London in 1978. A High ranking KGB official, Oleg Gordievsky, defected to London in 1985.
British prime minister Margaret Thatcher pursued a strong anti-communist policy in concert with Ronald Reaganduring the 1980s, in contrast with the détente policy of the 1970s, although relations became warmer after Mikhail Gorbachev came to power in 1985.
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After the collapse of the USSR, relations between Britain and the new Russian Federation were initially warm.[citation needed] In the 21st century, however, while trade and human ties have proliferated, diplomatic ties have suffered due to allegations of spying, and extradition disputes; thus escalating political tensions between London and Moscow.
The Foundations of Geopolitics, a Russian textbook published in 1997, has been one of the most influential books among Russian military, police, and statist foreign policy elites.[8] The book argues that Russia must isolate the United Kingdom from the politics of continental Europe.[8]
In 2003, Russia requested the extradition of "tycoon" Boris Berezovsky and Chechen separatist Akhmed Zakayev, but Britain refused, having given them both political asylum.[9]
In early 2006, Russia accused UK diplomats of espionage. Along with accusing British diplomats of spying in Moscow with the help of