@ call100 ... your comment re the number of 'inappropriate ballot papers' is very pertinent.
Nobody has, indeed, mentioned how inaccurate the ballot may or may not have been. However, if ex-BASSA members [and indeed ex-BA employees] keep contacting BA with information that they have received [multiple?] ballot papers in any number, the entire 'house of cards' comes crashing down.
There is simply NO justification for BASSA, at the heart of an IA campaign against BA, not having a credible database of members. The occasional error is understandable, and "would not significantly affect the outcome". My reading between the lines is that the administration of the ballot papers is an utter shambles and has a very tenuous link with the reality of the BASSA membership.
And, as more BASSA members take note of DH's latest invective, it might be some time before BASSA actually catches up with the membership list [and more importantly who is left to ballot]. I can understand the difficulty they face, and even vaguely sympathise with the sub-contracted Membership Secretary or whatever he is called, in trying to keep the database up to date. The fact remains that they NEED to do things properly, or they will just keep being laughed out of Court [literally].