IMPACT says it is very disappointed with the latest move by Aer Lingus on the airline's cost-cutting plan.
Chief executive Dermot Mannion has told the union that pay increases due to cabin crew members will be permanently withheld unless they sign up to the company's cost cutting plan by the end of the month.
The move looks set to put both sides on a collision course over the issue as IMPACT says Aer Lingus has no power to withhold increases due under the Towards 2016 agreement.
The union says the threat is another example of Aer Lingus heavy-handedness in dealing with its workers.