The Russian intelligence service's illegal use of the Canadian passport poses a “troubling threat” to the travel document's integrity, newly released federal memos warn.

Canada “strongly deplores” the exploitation of its passport by Russian agents to establish a spy ring in the United States, say the internal Foreign Affairs Department records.
http://www.theglobeandmail.com/news/...rticle2202598/

The widow of former Russian FSB officer Aleksandr Litvinenko, who was murdered in London in 2006, admitted that her husband cooperated with the British intelligence services MI5 and MI6.
At the reopened hearings in the case in London, Marina Litvinenko announced that she decided to disclose the information in the name of transparency of the investigation.
http://rt.com/news/litvinenko-britis...e-lugovoy-979/