I feel this is discrimination and I don't know but I would have thought the ops and choice agreement would form part of an agreement between Bassa, the bargaining union and the company, so cannot understand how it can be ignored without their agreement.
I am not sure that it is discrimination, though it could be seen as provocative.
BASSA have elected to be in dispute with the company for such a prolonged period of time, it should come as no great surprise that BA is getting on with the business of looking after those that it can. As there is collective bargaining in place it cannot deal with the BASSA members and those that have not signed the new deal until the dispute is settled. This may appear to be harsh but it is hardly surprising.