Before anyone even thinks of joining the case as a claimant they must get clarity from BASSA on the position on court costs (which are going to be a 6-7 figure sum, we're not talking about a couple of hundred quid...). I believe if you are a joint-claimant you are theoretically proportionally liable for any costs. Happy to proved wrong by a lawyer.
But why would BASSA and UNITE keep such a thing from their members? Is it the same way, Fume Event, that they are withholding the FACT that British Airways can sack any striker they wish. They just need to send someone down to the tribunal with a cheque months or even years later to pay whatever amount the unemployed benefit claimant has won for unfair dismissal.
I would suggest there is only one source of misinformation, half-truths and outright lies in this argument, and without giving too much of a clue away, they are the ones putting their members in the firing line!