Sorry Litebulbs but any professional who is grumpy with customers because they have a grudge against their boss isn't a professional. Perhaps that is part of the problem - they just aren't suited to customer service roles.
"So to put it simply, BA crew are paid on the face of it, above the market rate for the role in the UK and their employer has introduced new employees below this. If it was me, I would be worried and be striking for watertight guarantees. Whether they are achievable is the discussion point."
This, Litebulbs, is a smoke screen. The original dispute (from which all other disputes arise) was about imposition and "No negotiation". It is a sad sign of the mess that this dispute has become that Cabin Crew seem to have forgotten what it was they started striking about.