So why did the Socialist Workers Party want to break up the BA talks?

Leftwing protestors break up talks to prevent BA strike

Talks to avert a series of strikes by British Airways cabin crew ended in chaos last night as more than 100 leftwing demonstrators stormed the building where the talks were being held, forcing BA chief executive Willie Walsh to leave under police escort.

Officers were called to the headquarters of the conciliation service Acas after members of the Socialist Workers Party managed to get to the 23rd floor where leaders of the Unite union were conducting 11th-hour talks with BA's senior management. Union officials and Walsh were surrounded by the chanting demonstrators as Tony Woodley, joint leader of Unite, told them to "shut up", but the protesters stayed in the building until they were thrown out by police.

Woodley later described the activists as "lunatics" and "idiots" who were not members of Unite. He had described the meeting earlier as an opportunity to avert 15 days of strikes that will cost the airline "up to £100m".

"Negotiations have not broken down, they have been broken up. We have made some progress, but there is more to do," he said. "This was a complete waste of an early-evening. I am so disappointed… those idiots think they are helping, but they are outsiders. They are lunatics."
http://www.guardian.co.uk/business/2010/may/23/woodley-ba-strike-cost