Sorry RV. You are completely wrong. BASSA is part of UNITE who represent the majority of staff at BA. It is very unlikely that GSS will agree to Walsh's proposals either.
BASSA is not intransigent as it has already tabled proposals that give Walsh the savings he wants. All this mystical belief BASSA refuses to negotiate etc is absolute nonsense, peddled by a few people with a self serving motives.
As far as staff at LGW manning flights at LHR, they haven't enough crew for their own operation at the moment!!