About eleven miles up the road from me, in the forest near Macclesfield, you can still pick bits of shrapnel from a flying bomb out of trees in the woods. It was one from the same attack as I noted in my earlier post.
Apparently because the Fieseler 103 flying bomb was thrown together cheaply (having to only ever make one flight), the rocket motor would burn holes through the tubing of the exhaust pipe and allow gasses to escape sideways, effectively vectoring the thrust to the side and overcoming the gyros ability to adjust the autopilot enough to keep it on course. Which is why some landed there and in my hometown when they were actually aimed at Oldham quite a few miles away from where I live, so I reckon that one in Macclesfield was about thirty miles off target.
Chock