pugwash...
with regards to the unions and what previous members voted for:
You have joined after 2009, so you are not part of the old pension scheme anymore.
Let's say 3 years from now you are a valid ATCO and there's a ballot to extend your pension scheme to all employees, including those that were on the final pension. The alternative is to see YOUR scheme furtherly deprived.
What will YOU vote?
food for thought
Ivor