Oh what a tangled web we weaveNicholas Elliott, retired agent of the Secret Intelligence Service - better known as MI6. He blew Kim Philby as being a Soviet spy, causing Philby to escape to the USSR. Elliott worked under Philby in MI6, and initially defended Philby when he was under suspicion of being a Soviet double agent. Elliott's affection for Philby was matched only by his disgust when he learned the truth about his friend and mentor.
When first we practice to deceive;
But when you've practiced quite a bit,
You really get quite good at it.