The Wizard
If you go back to the original post on this thread and read that again, you will see that the "normal channels" have been well and truly clogged for many years.
Alec has so far (despite the best efforts of the Third Reich) exceeded the Biblical "three score years and ten" by some 30%. Time is of the essence if Alec is to be reunited with those documents that show exactly what he contributed to the Allied War effort whilst flying an unarmed aircraft over Enemy Occupied Territory. Remember that those documents were placed in the care of the RAF following a formal request from an RAF Unit.
One has to ask if RAF Benson, having failed to locate the missing items, have placed the investigation in the hands of the SIB. The longer this goes on the more likely that it is not a case of "lost property" but rather a case of theft for personal gain.