Tone it down, mate.
I was NOT saying that the traffic was moving in ANY direction.
There were two levels of traffic, flying in opposite directions over Leytonstone.
I was saying that, from the ground and given that I did not have a compass in my hand, I cannot be 100% sure that the traffic was moving north/south.
The reason I posted was because I thought you guys would know the answer. Obviously not.
To put a very rough figure on it, I would say the altitude was APPROXIMATELY 5,000 ft for the lower level of traffic.