not sure on this one guys,
seems you can track the blimps historic journey and see how it matches with images of 'UFO'
in addition the aerial shots the blimp was taking should be recognisable from an opposite perspective to those of the 'UFO' from ground level...
seems a bit of work is needed but this should determmine quite easily whether the object is a blimp or not.
Zoser, have you any further details on the 'grounded at the time ' comment as I would liek to follwo this up.
the tracker is rubbish TBH, wont tell us much.
looks like the pilots log would be better but has yet to be updated.