qwerrty
Don't expect the action to kick off in the next month while (a) the company are still awaiting the pensions final report ,(b) the trustees are awaiting their separate report commissioned into the companys ability to pay, (c) the trustees and the company meet after (a) and (b) above to refine the initial company proposals, (d) and until the company/trustees have put their agreed position to the employees.
Then anticipate (a) a series of special union meetings to garner support for the battle, (b) a legal balloting process for IA taking 2-3 weeks, (c) the required notification to the company (2-3 weeks?) of any intended action.
Add all of that up and draw your own conclusions, some time yet imho.