Far from the "legal blitz" alleged by the Nazi-obsessed BASSA, I believe it was the Electoral Reform Service (who administered the ballot on behalf of Unite) who refused to give their support to the ballot result.
If you examine the most recent ballot, ERS never actually released a statement on their notepaper setting out the results of the ballot; if you notice, the third ballot announcement was on ERS notepaper:
http://uniteba.com/ESW/Files/BA_ballot_result_consultative_20_7_2010.pdf
The latest (failed, fourth ballot) confirmation was initially communicated by Unite directly to its membership:
http://uniteba.com/ESW/Files/BAllot_..._21jan2011.pdf
I have never seen anything on ERS notepaper endorsing the most recent ballot result.
It will be telling on what notepaper the ballot result is publicised this time round (which I think shall be known as the “fourth” ballot).