<<Plus there is separation provided of a few miles in front, behind and to the side of the aircraft. Where this seperation cannot be maintained, different altitudes are flown by the aircraft.>>
I think most of us are aware of that but my point is that no controller at London Control is going to watch an aircraft weave about in that manner without doing something. Aeroplanes simply do not weave about the sky in a random fashion in busy airspace. They will either fly recognised tracks on standard routes or they will be on radar headings. In either case they will fly virtually straight lines. Even the slightest deviation would be observed on radar and queried. An aircraft flying the sort of pattern described here in the current security climate would raise considerable concern.