I think zkdli has just argued a point which if true would seem to mean you are wrong, Roffa.
In 2008 it should be possible for a third party pilot or controller analyst to exactly replay the scenario using the original data recorded in the state of the art systems. Evidently insufficient data is infact recorded to achieve this. I am sure that revelation surprises people. maybe NATS is short on diskspace too, or is it more problematic than that?