Moscow's planted a mole. It is one of five men. Does that not just thrum at your heartstrings? I would love to snag a PSL in the genre of espionage, friendship and political thriller. It can be about two or more friends, where one is a member of the British Parliament and an agent of influence for Kremlin, and at least one of the friends is a member of MI5. That's just the rudimentary idea, but I really don't mind an overhaul of the premise, so long as the flavour is there!