And BA is going to court to try and stop the strike:
BBC News - BA in legal challenge to strike
BBC News - BA in legal challenge to strike
British Airways is to take legal action to try to prevent a cabin crew strike set to begin on 22 December.
BA said it hoped the legal action would "protect customers from the massive stress and disruption" threatened by the 12-day stoppage.
It has highlighted "irregularities" in the strike ballot which it believes makes the outcome of the vote invalid.