Thank you Litebulbs for pointing out that the parties are Unite and BA.
_There is another document which is the 11 May 2011 "Briefing notes" issued jointly by Unite and BA.
_ And this contains the words that I was failing to find in the Settlement document
From the implementation of this agreement there will be a single cabin crew Unite branch at Heathrow.
A new single Unite branch and NSP will also be established for Gatwick to give it the autonomy to focus on its own future.