i honestly believe that the minimal communication from BA is strategic, in that BA is allowing Unite to dig a large hole with its large mouth.
Apart from a very light rebuff to the Media about reporting 'inaccuracies', BA is saying very little other than offering reassurance to the passengers [oops - they're the ones that fund BA, aren''t they?]. BA are being cool and sensible, and running an airline - period.
Unite is just stamping its feet and talking more gibberish that a gibbon on speed, and lying its way into the history books as "Unite The Untruth".
I do feel so sorry for the people who have been led down this path. The reasons have been discussed at length before - no need to repeat that.