Factual error: During the opening credits, we see three shots of a map tracking English's flight from Tibet to London. In the first shot, the plane correctly starts following the orthodrome through central Asia, but, in the next two shots, it is taking a meaningless detour over Africa. Furthermore, the labels are wrong: "Red Sea" when the plane is over Somalia, "Somalia" over Ethiopia, "Tunisia" over Libya. (00:04:59 - 00:05:35)
Factual error: In the helicopter scene, the assassin is using a Gatling-type weapon with a set of rotating barrels. However, the fire is coming out of the central spot where the axis should be. That's not how Gatling guns work. (00:42:25)
Answer: He didn't. Simon Ambrose, who was the real mole, tricked Johnny English into thinking Patch was a traitor.
Bishop73