It would not surprise me if BASSA have no idea what their true membership numbers are.
Of interest also was hearing McCluskey (I believe) state that they had received 7,000 and some odd number of "claims" this morning.
As BA knows exactly how many have lost staff travel and the representation is being made that they will fly 100% of long haul in the event of another strike its reasonable to believe that each "claim" does not represent a unique individual.
Unite/BASSA do like getting creative with numbers.