Spy chiefs have issued an unprecedented public warning after uncovering another dramatic plot to assassinate a Russian politician in London.
Court papers reveal MI5 fear the exile Akhmed Zakayev, a friend of actress Vanessa Redgrave, is the intended target of a 'hit'.
On their advice, the Home Secretary has fought a court battle to remove the man security services believe would organise his murder.
MI5 say he is a danger to 'national security'.
But The Sunday Telegraph reported today that judges have allowed him to stay in Britain and fight to remain here.
The case raises serious questions about how Britain can be protected from foreign threats. Read More