I am not sure what anti-union sentiment is.
I am very pro those parts of Unite and other TUs that I have worked with.
I am very anti some of them - such as the nutter Trots that wanted to close Grangemouth and lose thousands of jobs.
I know little about BALPA.
I am suspicious of BASSA.

Is that an anti-union sentiment?

Enough of that. I do hope that the TUs get BA to see sense and that departures are made to enable dignity for all.